1
|
Wootton JM, Tam JKF, Unsworth WP. Cascade ring expansion reactions for the synthesis of medium-sized rings and macrocycles. Chem Commun (Camb) 2024; 60:4999-5009. [PMID: 38655659 DOI: 10.1039/d4cc01303d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
This Feature Article discusses recent advances in the development of cascade ring expansion reactions for the synthesis of medium-sized rings and macrocycles. Cascade ring expansion reactions have much potential for use in the synthesis of biologically important medium-sized rings and macrocycles, most notably as they don't require high dilution conditions, which are commonly used in established end-to-end macrocyclisation methods. Operation by cascade ring expansion method can allow large ring products to be accessed via rearrangements that proceed exclusively by normal-sized ring cyclisation steps. Ensuring that there is adequate thermodynamic driving force for ring expansion is a key challenge when designing such methods, especially for the expansion of normal-sized rings into medium-sized rings. This Article is predominantly focused on methods developed in our own laboratory, with selected works by other groups also discussed. Thermodynamic considerations, mechanism, reaction design, route planning and future perspective for this field are all covered.
Collapse
Affiliation(s)
- Jack M Wootton
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK.
| | - Jerry K F Tam
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK.
| | - William P Unsworth
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK.
| |
Collapse
|
2
|
Qi SS, Dong JY, Sun XP, Zhai JJ, Sun YB, Wang YF, Chu MM, Xu DQ. Diastereo- and Enantioselective Synthesis of Eight-Membered N-Heterocycles from Benzofuran-Derived Azadienes and Ynones. J Org Chem 2024. [PMID: 38181067 DOI: 10.1021/acs.joc.3c02045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2024]
Abstract
Enantioselective synthesis of eight-membered N-heterocycles represents a long-standing challenge in organic synthesis. Here, by combining the squaramide and DBU catalysis, a sequential asymmetric conjugate addition/cyclization reaction between benzofuran-derived azadienes and ynones has been well-developed, providing straightforward access to chiral eight-membered N-heterocycles in high yields with stereoselectivities. This protocol features the use of a bifunctional squaramide catalyst for controlling the enantioselectivity of products, while the DBU is utilized to achieve intramolecular cyclization and improve the diastereoselectivity of products.
Collapse
Affiliation(s)
- Suo-Suo Qi
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Department of Green Chemistry and Technology, Hangzhou 310014, P.R. China
| | - Jia-Yi Dong
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Department of Green Chemistry and Technology, Hangzhou 310014, P.R. China
| | - Xiao-Ping Sun
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Department of Green Chemistry and Technology, Hangzhou 310014, P.R. China
| | - Jing-Jing Zhai
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Department of Green Chemistry and Technology, Hangzhou 310014, P.R. China
| | - Yan-Biao Sun
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Department of Green Chemistry and Technology, Hangzhou 310014, P.R. China
| | - Yi-Feng Wang
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Department of Green Chemistry and Technology, Hangzhou 310014, P.R. China
| | - Ming-Ming Chu
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Department of Green Chemistry and Technology, Hangzhou 310014, P.R. China
| | - Dan-Qian Xu
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Department of Green Chemistry and Technology, Hangzhou 310014, P.R. China
| |
Collapse
|
3
|
Khan SA, Kumar AS, Swamy KCK. DBU-Catalyzed Ring Expansion or Ene-amine Formation Involving δ-Acetoxy Allenoates and N-Sulfonyl Hydrazides. Org Lett 2023; 25:3713-3717. [PMID: 37184439 DOI: 10.1021/acs.orglett.3c01166] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
DBU-catalyzed spiro-annulation and concomitant ring expansion/domino reaction of δ-acetoxy allenoates with cycl-2-ene-N-sulfonyl hydrazides afford ring-expanded (5 → 6, 6 → 7, and 7 → 8) products. By contrast, cycl-3-ene/ane-N-sulfonyl hydrazones under similar conditions deliver pyrazole cores with the same allenoate that involves allylic elimination in which δ-acetoxy allenoate serves as 3C-synthon. The key spirocyclic intermediates, as well as dienyl-amine intermediates, are isolated and characterized. An extension to (R)-(-)-carvone-derived sulfonyl hydrazide also led to ring expansion and gave pyrazoloazepine.
Collapse
Affiliation(s)
- Shabbir Ahmed Khan
- School of Chemistry, University of Hyderabad, Hyderabad 500046, Telangana, India
| | - A Sanjeeva Kumar
- School of Chemistry, University of Hyderabad, Hyderabad 500046, Telangana, India
| | - K C Kumara Swamy
- School of Chemistry, University of Hyderabad, Hyderabad 500046, Telangana, India
| |
Collapse
|
4
|
Yan H, Zhang C, Han JJ, Du SS, Hua YZ, Wang MC, Mei GJ, Jia SK. Zinc-Catalyzed Asymmetric Cascade Michael/Acyl Transfer Reaction between α-Hydroxy Aryl Ketones and Enynones. Org Lett 2023; 25:1918-1923. [PMID: 36926928 DOI: 10.1021/acs.orglett.3c00446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Abstract
We described herein a neoteric enantioselective cascade Michael/acyl transfer reaction of enynones and α-hydroxy aryl ketones catalyzed by dinuclear zinc cooperative catalysis. A series of structurally diverse chiral 1,5-dicarbonyl compounds were synthesized in good yields with excellent stereoselectivities. This strategy features broad substrate scope, high atom economy, as well as enynones as efficient electrophilic acyl transfer reagents in asymmetric cascade reactions for the first time.
Collapse
Affiliation(s)
- Hang Yan
- College of Chemistry and Institute of Green Catalysis, Zhengzhou University, Zhengzhou, Henan 450000, People's Republic of China
| | - Cui Zhang
- College of Chemistry and Institute of Green Catalysis, Zhengzhou University, Zhengzhou, Henan 450000, People's Republic of China
| | - Jiao-Jiao Han
- College of Chemistry and Institute of Green Catalysis, Zhengzhou University, Zhengzhou, Henan 450000, People's Republic of China
| | - Si-Si Du
- College of Chemistry and Institute of Green Catalysis, Zhengzhou University, Zhengzhou, Henan 450000, People's Republic of China
| | - Yuan-Zhao Hua
- College of Chemistry and Institute of Green Catalysis, Zhengzhou University, Zhengzhou, Henan 450000, People's Republic of China
| | - Min-Can Wang
- College of Chemistry and Institute of Green Catalysis, Zhengzhou University, Zhengzhou, Henan 450000, People's Republic of China
| | - Guang-Jian Mei
- College of Chemistry and Institute of Green Catalysis, Zhengzhou University, Zhengzhou, Henan 450000, People's Republic of China
| | - Shi-Kun Jia
- College of Chemistry and Institute of Green Catalysis, Zhengzhou University, Zhengzhou, Henan 450000, People's Republic of China
| |
Collapse
|
5
|
d’Aleman A, Gayraud O, Fressigné C, Petit E, Bailly L, Maddaluno J, De Paolis M. Organocatalyzed enantio- and diastereoselective isomerization of prochiral 1,3-cyclohexanediones into nonalactones bearing distant stereocenters. Chem Sci 2023; 14:2107-2113. [PMID: 36845928 PMCID: PMC9945243 DOI: 10.1039/d2sc06842g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 01/27/2023] [Indexed: 01/30/2023] Open
Abstract
The lactonization of 2-(2-nitrophenyl)-1,3-cyclohexanediones containing an alcohol side chain and up to three distant prochiral elements is reported by isomerization under the mediation of simple organocatalysts such as quinidine. Through a process of ring expansion, strained nonalactones and decalactone are produced with up to three stereocenters in high er and dr (up to 99 : 1). Distant groups, including alkyl, aryl, carboxylate and carboxamide moieties, were examined.
Collapse
|
6
|
A Lewis Acid-Promoted Michael Addition and Ring-Expansion Cascade for the Construction of Nitrogen-Containing Medium-Sized Rings. Molecules 2023; 28:molecules28041650. [PMID: 36838638 PMCID: PMC9966210 DOI: 10.3390/molecules28041650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 02/03/2023] [Accepted: 02/04/2023] [Indexed: 02/11/2023] Open
Abstract
A Lewis acid-promoted annulation of azadienes and cyclobutamines was developed. This reaction proceeded through Michael addition and ring-expansion cascade, affording the corresponding nitrogen-containing medium-sized rings with a broad scope in moderate to high yields. The catalytic asymmetric version of this reaction has also been explored using a chiral base.
Collapse
|
7
|
Xu H, Ma S. Palladium-Catalyzed [6+2] Double Allene Annulation for Benzazocines Synthesis. Angew Chem Int Ed Engl 2023; 62:e202213676. [PMID: 36372784 DOI: 10.1002/anie.202213676] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 11/07/2022] [Accepted: 11/11/2022] [Indexed: 11/15/2022]
Abstract
An efficient double allene protocol for the formation of benzazocines has been developed. The reaction constitutes a highly regioselective palladium-catalyzed formal [6+2] annulation of allenyl benzoxazinanones with terminal allenes forming the challenging 8-membered cycles. Decent yields and excellent regioselectivity have been observed under mild conditions with a remarkable Z-stereoselectivity for the exo-cyclic C=C bonds. The synthetic potentials of benzazocine products have been demonstrated.
Collapse
Affiliation(s)
- Haibo Xu
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Shengming Ma
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, P. R. China.,Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433, P. R. China
| |
Collapse
|
8
|
Abdelli A, Bejaoui O, Bougatef H, Ouni S, Sila A, M’rabet H, Moreau X, Efrit ML, Prim D. Synthesis and evaluation of new phosphonated δ‐lactam and glutarimide derivatives as angiotensin converting enzyme inhibitors. J Heterocycl Chem 2022. [DOI: 10.1002/jhet.4566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Abderrahmen Abdelli
- Laboratoire de synthèse organique et hétérocyclique sélective‐Evaluation d’activité biologique, LR17ES01 Université de Tunis El Manar, Faculté des Sciences de Tunis Tunis Tunisie
| | - Oumayma Bejaoui
- Laboratoire de synthèse organique et hétérocyclique sélective‐Evaluation d’activité biologique, LR17ES01 Université de Tunis El Manar, Faculté des Sciences de Tunis Tunis Tunisie
- Université Paris‐Saclay, UVSQ, CNRS, Institut Lavoisier de Versailles Versailles France
| | - Hajer Bougatef
- Laboratory for the Improvement of Plants and Valorization of Agroressources, National School of Engineering of Sfax (ENIS) University of Sfax Sfax Tunisia
| | - Sarra Ouni
- Laboratoire de synthèse organique et hétérocyclique sélective‐Evaluation d’activité biologique, LR17ES01 Université de Tunis El Manar, Faculté des Sciences de Tunis Tunis Tunisie
- Université Paris‐Saclay, UVSQ, CNRS, Institut Lavoisier de Versailles Versailles France
| | - Assaâd Sila
- Laboratory for the Improvement of Plants and Valorization of Agroressources, National School of Engineering of Sfax (ENIS) University of Sfax Sfax Tunisia
- Department of Life Sciences, Faculty of Sciences of Gafsa Gafsa University Gafsa Tunisia
| | - Hedi M’rabet
- Laboratoire de synthèse organique et hétérocyclique sélective‐Evaluation d’activité biologique, LR17ES01 Université de Tunis El Manar, Faculté des Sciences de Tunis Tunis Tunisie
| | - Xavier Moreau
- Université Paris‐Saclay, UVSQ, CNRS, Institut Lavoisier de Versailles Versailles France
| | - Mohamed Lotfi Efrit
- Laboratoire de synthèse organique et hétérocyclique sélective‐Evaluation d’activité biologique, LR17ES01 Université de Tunis El Manar, Faculté des Sciences de Tunis Tunis Tunisie
| | - Damien Prim
- Université Paris‐Saclay, UVSQ, CNRS, Institut Lavoisier de Versailles Versailles France
| |
Collapse
|
9
|
Du JY, Balan T, Claridge TDW, Smith MD. Counterion-Mediated Enantioconvergent Synthesis of Axially Chiral Medium Rings. J Am Chem Soc 2022; 144:14790-14797. [PMID: 35921549 PMCID: PMC9394463 DOI: 10.1021/jacs.2c05485] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
There are few enantioconvergent reactions in which racemic substrates bearing multiple stereochemical features are converted into products with high levels of diastereo- and enantiocontrol. Here, we disclose a process for the highly enantio- and diastereoselective syntheses of medium ring lactams via an intramolecular counterion-directed C-alkylation reaction. The treatment of racemic biaryl anilides that exist as a complex mixture of enantiomers and diastereoisomeric conformers by virtue of multiple axes of restricted rotation with a quinidine-derived ammonium salt under basic conditions affords medium ring lactams bearing elements of both axial and point chirality via an enolate-driven configurational relaxation process. Thermal equilibration of the syn- and anti-product diasteroisomers has demonstrated that the barriers to bowl inversion are >124 kJ mol-1. We propose that the chiral ammonium salt differentiates between a complex and rapidly equilibrating mixture of enolate and rotational isomers, ultimately leading to highly enantioselective alkylative ring closure. This dynamic and enantioconvergent process offers an operationally simple approach to the synthesis of valuable chiral medium ring lactams for which there are few catalytic and enantioselective approaches.
Collapse
Affiliation(s)
- Ji-Yuan Du
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom.,College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
| | - Tudor Balan
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Tim D W Claridge
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Martin D Smith
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| |
Collapse
|
10
|
Wang B, Zhong H, Tian X. KO tBu-promoted Michael/aldol/ring-opening cascade reaction of cyclobutanones with chalcones. Chem Commun (Camb) 2022; 58:9222-9225. [PMID: 35899611 DOI: 10.1039/d2cc03007a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient Michael/aldol/ring-opening cascade reaction of cyclobutanones with chalcones has been developed. This protocol employs inexpensive potassium tert-butoxide (KOtBu) as a promoter and enables an efficient synthesis of densely substituted cyclohex-3-ene-carboxylic acids in high yields with high diastereoselectivities, which are difficult to prepare through conventional approaches. The significant advantages of this methodology include transition-metal-free conditions, readily available starting materials, wide scope and high atom economy.
Collapse
Affiliation(s)
- Biao Wang
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Molecular Target & Clinical Pharmacology, the NMPA and State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, China.
| | - Han Zhong
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Molecular Target & Clinical Pharmacology, the NMPA and State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, China.
| | - Xu Tian
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Molecular Target & Clinical Pharmacology, the NMPA and State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, China.
| |
Collapse
|
11
|
Lee JY, Varshnaya RK, Yoo EJ. Synthesis of Chiral Diazocine Derivatives via a Copper-Catalyzed Dearomative [5+3] Cycloaddition. Org Lett 2022; 24:3731-3735. [PMID: 35549493 DOI: 10.1021/acs.orglett.2c01389] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Copper-catalyzed [5+3] cycloaddition of N-aromatic zwitterions and enol diazoacetates produced enantio-enriched diazocine derivatives. A sterically encumbered BOX ligand and NaBArF additive played significant roles in driving the overall catalytic process via the unfavorable dearomatization to construct the desired eight-membered heterocyclic compounds. The induced stereoselectivity was preserved after further modifications of the skeleton, which demonstrates the potential applications of the developed asymmetric catalysis.
Collapse
Affiliation(s)
- Ju Young Lee
- Department of Applied Chemistry, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Rohit Kumar Varshnaya
- Department of Applied Chemistry, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Eun Jeong Yoo
- Department of Applied Chemistry, Kyung Hee University, Yongin 17104, Republic of Korea
| |
Collapse
|
12
|
Chen J, Zhou Q, Fang H, Lu P. Dancing on Ropes ‐ Enantioselective Functionalization of Preformed Four‐membered Carbocycles. CHINESE J CHEM 2022. [DOI: 10.1002/cjoc.202100879] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jun Chen
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu Shanghai 200433 China
| | - Qiang Zhou
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu Shanghai 200433 China
| | - Huayi Fang
- School of Materials Science and Engineering, Tianjin Key Lab for Rare Earth Materials and Applications, Nankai University, No 38 Tongyan Road Tianjin 300350 China
| | - Ping Lu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu Shanghai 200433 China
| |
Collapse
|
13
|
Paulisch TO, Mai LA, Strieth‐Kalthoff F, James MJ, Henkel C, Guldi DM, Glorius F. Dynamische kinetische Sensibilisierung von β‐Dicarbonyl‐verbindungen – Zugang zu mittelgroßen Ringen durch eine De‐Mayo‐artige Ringerweiterung. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202112695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Tiffany O. Paulisch
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Lukas A. Mai
- Department Chemie und Pharmazie Friedrich-Alexander-Universität Erlangen-Nürnberg Egerlandstraße 3 91058 Erlangen Deutschland
| | - Felix Strieth‐Kalthoff
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Michael J. James
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Christian Henkel
- Department Chemie und Pharmazie Friedrich-Alexander-Universität Erlangen-Nürnberg Egerlandstraße 3 91058 Erlangen Deutschland
| | - Dirk M. Guldi
- Department Chemie und Pharmazie Friedrich-Alexander-Universität Erlangen-Nürnberg Egerlandstraße 3 91058 Erlangen Deutschland
| | - Frank Glorius
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| |
Collapse
|
14
|
Xie F, Sun Y, Song H, Dong S, Zhao Q, Liu J, Miao Y. Ligand- and Substrate-Controlled Chemodivergent Pd-Catalyzed Annulations of Cyclic β-Keto Esters with 3-Aryl-2 H-azirines. Org Lett 2021; 24:268-273. [PMID: 34889615 DOI: 10.1021/acs.orglett.1c03933] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Chemodivergent Pd-catalyzed annulations of cyclic β-keto esters with 3-aryl-2H-azirines have been developed to provide rapid access to eight-membered ring lactams, bicyclic 3,4-dihydro-2H-pyrrole derivatives, and (E)-methyl [2-(2-oxocyclohexylidene)-2-phenylethyl]carbamates with high efficiency. The chemoselectivity can be determined by tuning the mono- or bisphosphine ligands as well as the substrate structure of cyclic β-keto esters.
Collapse
Affiliation(s)
- Fang Xie
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong 273165, China
| | - Yajun Sun
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong 273165, China
| | - Hanghang Song
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong 273165, China
| | - Shijie Dong
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong 273165, China
| | - Qin Zhao
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong 273165, China
| | - Jiayi Liu
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong 273165, China
| | - Yu Miao
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong 273165, China
| |
Collapse
|
15
|
Leverenz M, Masson G, Pardo DG, Cossy J. Synthesis of Azocanes from Piperidines via an Azetidinium Intermediate. Chemistry 2021; 27:16325-16328. [PMID: 34643301 DOI: 10.1002/chem.202102739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Indexed: 11/11/2022]
Abstract
α-Trifluoromethyl azocanes are accessible from 2-(trifluoropropan-2-ol) piperidines by metal-free ring-expansion involving a bicyclic azetidinium intermediate. The opening of the azetidinium intermediate was achieved by various nucleophiles (amines, alcoholates, carboxylates, phosphonates, halides and pseudo-halides) with an excellent regio- diastereo- and enantioselectivity and in good yields. The relative configuration of the piperidines and azocanes were assigned and the deprotected azocanes offer opportunities for further derivatization.
Collapse
Affiliation(s)
- Malte Leverenz
- Molecular, Macromolecular Chemistry and Materials, UMR 7167 ESPCI Paris, CNRS, PSL University, 10 rue Vauquelin, 75231, Paris Cedex 05, France
| | - Guillaume Masson
- Molecular, Macromolecular Chemistry and Materials, UMR 7167 ESPCI Paris, CNRS, PSL University, 10 rue Vauquelin, 75231, Paris Cedex 05, France
| | - Domingo Gomez Pardo
- Molecular, Macromolecular Chemistry and Materials, UMR 7167 ESPCI Paris, CNRS, PSL University, 10 rue Vauquelin, 75231, Paris Cedex 05, France
| | - Janine Cossy
- Molecular, Macromolecular Chemistry and Materials, UMR 7167 ESPCI Paris, CNRS, PSL University, 10 rue Vauquelin, 75231, Paris Cedex 05, France
| |
Collapse
|
16
|
Paulisch TO, Mai LA, Strieth-Kalthoff F, James MJ, Henkel C, Guldi DM, Glorius F. Dynamic Kinetic Sensitization of β-Dicarbonyl Compounds-Access to Medium-Sized Rings by De Mayo-Type Ring Expansion. Angew Chem Int Ed Engl 2021; 61:e202112695. [PMID: 34818464 DOI: 10.1002/anie.202112695] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Indexed: 11/09/2022]
Abstract
Herein, we present a photocatalyzed two-carbon ring expansion of β-dicarbonyl compounds with unactivated olefins that provides facile access to medium-sized rings. Selective sensitization of the substoichiometric enol tautomer enables reactivity of substrates incompatible with the classical De Mayo reaction conditions. Key to success is the identification of the metal-based sensitizer fac-[Ir(CF3 -pmb)3 ], which can be excited using common near-visible LEDs, and possesses a high triplet excited state energy of 73.3 kcal mol-1 . This exactly falls in the range between the triplet energies of the enol and keto tautomer, thereby enabling a dynamic kinetic sensitization. Demonstrating the applicability of fac-[Ir(CF3 -pmb)3 ] as a photocatalyst in organic synthesis for the first time, we describe a two-step photocycloaddition-ring-opening cascade with β-ketoesters, -diketones, and -ketoamides. The mechanism has been corroborated by time-resolved spectroscopy, as well as further experimental and computational studies.
Collapse
Affiliation(s)
- Tiffany O Paulisch
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Lukas A Mai
- Department Chemie und Pharmazie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, 91058, Erlangen, Germany
| | - Felix Strieth-Kalthoff
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Michael J James
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Christian Henkel
- Department Chemie und Pharmazie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, 91058, Erlangen, Germany
| | - Dirk M Guldi
- Department Chemie und Pharmazie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, 91058, Erlangen, Germany
| | - Frank Glorius
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| |
Collapse
|
17
|
Li Q, Cai Y, Hu Y, Jin H, Chen F, Liu Y, Zhou B. Nickel-catalyzed cyclization of 1,7-enynes for the selective synthesis of dihydrocyclobuta[ c]quinolin-3-ones and benzo[ b]azocin-2-ones. Chem Commun (Camb) 2021; 57:11657-11660. [PMID: 34671793 DOI: 10.1039/d1cc04750g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
We herein described a nickel-catalyzed cyclization of N-(o-ethynylaryl)acrylamides for the selective synthesis of dihydrocyclobuta[c]quinolin-3-ones and benzo[b]azocin-2-ones. The two varied products could be easily obtained by tuning the reaction temperature. This reaction features easy temperature-control, high efficiency, and gram-scale synthesis.
Collapse
Affiliation(s)
- Qiao Li
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China. .,Institute of Pharmaceutical Science and Technology, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Yun Cai
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China.
| | - Yuanyuan Hu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China.
| | - Hongwei Jin
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China.
| | - Fener Chen
- Institute of Pharmaceutical Science and Technology, Zhejiang University of Technology, Hangzhou, 310014, China.,Engineering Center of Catalysis and Synthesis for Chiral Molecules, Department of Chemistry, Fudan University, Shanghai, 200433, China.
| | - Yunkui Liu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China.
| | - Bingwei Zhou
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China.
| |
Collapse
|
18
|
Šebesta R, Veverková E, Molnosiová P. Asymmetric Sequential Michael Addition and Cyclization Reactions of 2-(2-Nitrovinyl)phenols Catalyzed by Bifunctional Amino-Squaramides. SYNOPEN 2021. [DOI: 10.1055/s-0040-1719843] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
AbstractIn this work, we describe the Michael addition–cyclization reaction of 2-(2-nitrovinyl)phenol with two different reactive Michael donors, which lead to chiral benzopyran derivatives. Specifically, bifunctional amino-squaramides with one or two chiral units in the side chains were evaluated as catalysts in these transformations. Furthermore, the utility of selected green solvents as reaction media for these processes was also tested. The best result was achieved with methyl-cyclopentanone-2-carboxylate as the Michael donor in ethyl (–)-l-lactate with quinine-based amino-squaramide as catalyst (yield 72%, dr >99:1, ee 99%).
Collapse
|
19
|
Yang WL, Wang YL, Li W, Gu BM, Wang SW, Luo X, Tian BX, Deng WP. Diastereo- and Enantioselective Synthesis of Eight-Membered Heterocycles via an Allylation/Ring Expansion Sequence Enabled by Multiple Catalysis. ACS Catal 2021. [DOI: 10.1021/acscatal.1c03711] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Wu-Lin Yang
- School of Pharmacy and Shanghai Key Laboratory of New Drug Design, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Yuan-Lin Wang
- School of Pharmacy and Shanghai Key Laboratory of New Drug Design, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Wen Li
- School of Pharmacy and Shanghai Key Laboratory of New Drug Design, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Bu-Ming Gu
- School of Pharmacy and Shanghai Key Laboratory of New Drug Design, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Si-Wen Wang
- School of Pharmacy and Shanghai Key Laboratory of New Drug Design, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Xiaoyan Luo
- School of Pharmacy and Shanghai Key Laboratory of New Drug Design, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Bo-Xue Tian
- MOE Key Laboratory of Bioinformatics, School of Pharmaceutical Sciences, Tsinghua University, Beijing 100084, China
| | - Wei-Ping Deng
- School of Pharmacy and Shanghai Key Laboratory of New Drug Design, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, Jinhua 321004, China
| |
Collapse
|
20
|
Chen J, Shi Z, Li C, Lu P. Catalytic enantioselective synthesis of benzocyclobutenols and cyclobutanols via a sequential reduction/C-H functionalization. Chem Sci 2021; 12:10598-10604. [PMID: 34447553 PMCID: PMC8356817 DOI: 10.1039/d1sc02119b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 07/02/2021] [Indexed: 11/21/2022] Open
Abstract
We report here a sequential enantioselective reduction/C-H functionalization to install contiguous stereogenic carbon centers of benzocyclobutenols and cyclobutanols. This strategy features a practical enantioselective reduction of a ketone and a diastereospecific iridium-catalyzed C-H silylation. Further transformations have been explored, including controllable regioselective ring-opening reactions. In addition, this strategy has been utilized for the synthesis of three natural products, phyllostoxin (proposed structure), grandisol and fragranol.
Collapse
Affiliation(s)
- Jun Chen
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| | - Zhan Shi
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| | - Chunyu Li
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| | - Ping Lu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 P. R. China
| |
Collapse
|
21
|
Barday M, Bouillac P, Coquerel Y, Amatore M, Constantieux T, Rodriguez J. Enantioselective Organocatalytic Syntheses and Ring‐Expansions of Cyclobutane Derivatives. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100405] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Manuel Barday
- Aix-Marseille Univ, CNRS, Centrale Marseille, iSm2 Marseille France
| | - Pierre Bouillac
- Aix-Marseille Univ, CNRS, Centrale Marseille, iSm2 Marseille France
| | - Yoann Coquerel
- Aix-Marseille Univ, CNRS, Centrale Marseille, iSm2 Marseille France
| | - Muriel Amatore
- Aix-Marseille Univ, CNRS, Centrale Marseille, iSm2 Marseille France
| | | | - Jean Rodriguez
- Aix-Marseille Univ, CNRS, Centrale Marseille, iSm2 Marseille France
| |
Collapse
|
22
|
Yang G, Ke Y, Zhao Y. Stereoselective Access to Polyfunctionalized Nine‐Membered Heterocycles by Sequential Gold and Palladium Catalysis. Angew Chem Int Ed Engl 2021; 60:12775-12780. [DOI: 10.1002/anie.202102061] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 03/28/2021] [Indexed: 11/05/2022]
Affiliation(s)
- Guoqiang Yang
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Ya‐Ming Ke
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Yu Zhao
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
- Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University Binhai New City Fuzhou 350207 China
| |
Collapse
|
23
|
Yang G, Ke Y, Zhao Y. Stereoselective Access to Polyfunctionalized Nine‐Membered Heterocycles by Sequential Gold and Palladium Catalysis. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202102061] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Guoqiang Yang
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Ya‐Ming Ke
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Yu Zhao
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
- Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University Binhai New City Fuzhou 350207 China
| |
Collapse
|
24
|
Qiao J, Zhao W, Liang Y, Yao ZJ, Wang S. Diastereoselective Access to Tetracyclic Eight-Membered Lactams through a Dearomative Heck Reaction and an Alkylative Ring-Opening Driven by Photoexcited Spiroindolines. Chemistry 2021; 27:6308-6314. [PMID: 33506517 DOI: 10.1002/chem.202005369] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 01/25/2021] [Indexed: 11/05/2022]
Abstract
An external-photocatalyst-free, light-driven alkylative ring-opening of stable spiroindolines was developed to construct indolo- and benzoannulated eight-membered lactams. The spiroindolines were prepared from tetrahydro-β-carbolines by a dearomative Heck reaction. Mechanistic experimental studies on the alkylative ring opening suggested that a photoredox pathway was involved, in which the spiroindoline performed as both reagent and photosensitizer. DFT calculations showed that the radical addition toward a cyclic alkene was the key to the diastereoselective formation of tetracyclic medium-sized lactams.
Collapse
Affiliation(s)
- Jianhui Qiao
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratoryof Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R. China
| | - Wenxuan Zhao
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratoryof Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R. China
| | - Yong Liang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratoryof Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R. China
| | - Zhu-Jun Yao
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratoryof Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R. China
| | - Shaozhong Wang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratoryof Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R. China
| |
Collapse
|
25
|
Zheng H, Wang R, Wang K, Wherritt D, Arman H, Doyle MP. Formal [4 + 4]-, [4 + 3]-, and [4 + 2]-cycloaddition reactions of donor-acceptor cyclobutenes, cyclopropenes and siloxyalkynes induced by Brønsted acid catalysis. Chem Sci 2021; 12:4819-4824. [PMID: 34168758 PMCID: PMC8179600 DOI: 10.1039/d1sc00158b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 02/16/2021] [Indexed: 02/04/2023] Open
Abstract
Brønsted acid catalyzed formal [4 + 4]-, [4 + 3]-, and [4 + 2]-cycloadditions of donor-acceptor cyclobutenes, cyclopropenes, and siloxyalkynes with benzopyrylium ions are reported. [4 + 2]-cyclization/deMayo-type ring-extension cascade processes produce highly functionalized benzocyclooctatrienes, benzocycloheptatrienes, and 2-naphthols in good to excellent yields and selectivities. Moreover, the optical purity of reactant donor-acceptor cyclobutenes is fully retained during the cascade. The 1,3-dicarbonyl product framework of the reaction products provides opportunities for salen-type ligand syntheses and the construction of fused pyrazoles and isoxazoles that reveal a novel rotamer-diastereoisomerism.
Collapse
Affiliation(s)
- Haifeng Zheng
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
| | - Rui Wang
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
| | - Kan Wang
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
| | - Daniel Wherritt
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
| | - Hadi Arman
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
| | - Michael P Doyle
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
| |
Collapse
|
26
|
Palate KY, Epton RG, Whitwood AC, Lynam JM, Unsworth WP. Synthesis of macrocyclic and medium-sized ring thiolactones via the ring expansion of lactams. Org Biomol Chem 2021; 19:1404-1411. [PMID: 33491715 DOI: 10.1039/d0ob02502j] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A side chain insertion method for the ring expansion of lactams into macrocyclic thiolactones is reported, that can also be incorporated into Successive Ring Expansion (SuRE) sequences. The reactions are less thermodynamically favourable than the analogous lactam- and lactone-forming ring expansion processes (with this notion supported by DFT data), but nonetheless, three complementary protecting group strategies have been developed to enable this challenging transformation to be achieved.
Collapse
Affiliation(s)
- Kleopas Y Palate
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK.
| | - Ryan G Epton
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK.
| | - Adrian C Whitwood
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK.
| | - Jason M Lynam
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK.
| | - William P Unsworth
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK.
| |
Collapse
|
27
|
Wen KG, Liu C, Wei DH, Niu YF, Peng YY, Zeng XP. Catalytic Enantioselective Desymmetrization of Cyclobutane-1,3-diones by Carbonyl-Amine Condensation. Org Lett 2021; 23:1118-1122. [DOI: 10.1021/acs.orglett.1c00067] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Kai-Ge Wen
- Key Laboratory of Small Functional Organic Molecule, Ministry of Education and Jiangxi Key Laboratory of Green Chemistry, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
| | - Chao Liu
- Key Laboratory of Small Functional Organic Molecule, Ministry of Education and Jiangxi Key Laboratory of Green Chemistry, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
| | - Dong-Hui Wei
- Key Laboratory of Small Functional Organic Molecule, Ministry of Education and Jiangxi Key Laboratory of Green Chemistry, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
| | - Yan-Fei Niu
- Shanghai Key Laboratory of Green Chemistry and Chemical Process, East China Normal University, Shanghai 200062, China
| | - Yi-Yuan Peng
- Key Laboratory of Small Functional Organic Molecule, Ministry of Education and Jiangxi Key Laboratory of Green Chemistry, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
| | - Xing-Ping Zeng
- Key Laboratory of Small Functional Organic Molecule, Ministry of Education and Jiangxi Key Laboratory of Green Chemistry, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
| |
Collapse
|
28
|
Zhang X, Lin L, Li J, Duan S, Long Y, Li J. Recent Progress in the Synthesis of Medium-Sized Ring and Macrocyclic Compounds. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202010026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
29
|
Lawer A, Epton RG, Stephens TC, Palate KY, Lodi M, Marotte E, Lamb KJ, Sangha JK, Lynam JM, Unsworth WP. Evaluating the Viability of Successive Ring-Expansions Based on Amino Acid and Hydroxyacid Side-Chain Insertion. Chemistry 2020; 26:12674-12683. [PMID: 32432817 PMCID: PMC7589337 DOI: 10.1002/chem.202002164] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Indexed: 01/20/2023]
Abstract
The outcome of ring-expansion reactions based on amino/hydroxyacid side-chain insertion is strongly dependent on ring size. This manuscript, which builds upon our previous work on Successive Ring Expansion (SuRE) methods, details efforts to better define the scope and limitations of these reactions on lactam and β-ketoester ring systems with respect to ring size and additional functionality. The synthetic results provide clear guidelines as to which substrate classes are more likely to be successful and are supported by computational results, using a density functional theory (DFT) approach. Calculating the relative Gibbs free energies of the three isomeric species that are formed reversibly during ring expansion enables the viability of new synthetic reactions to be correctly predicted in most cases. The new synthetic and computational results are expected to support the design of new lactam- and β-ketoester-based ring-expansion reactions.
Collapse
Affiliation(s)
- Aggie Lawer
- Department of ChemistryUniversity of YorkYorkYO10 5DDUK
| | - Ryan G. Epton
- Department of ChemistryUniversity of YorkYorkYO10 5DDUK
| | | | | | - Mahendar Lodi
- Department of ChemistryUniversity of YorkYorkYO10 5DDUK
| | - Emilie Marotte
- ENSICAEN6 Boulevard Maréchal Juin, CS 4505314050Caen Cedex 04France
| | - Katie J. Lamb
- Department of ChemistryUniversity of YorkYorkYO10 5DDUK
| | | | | | | |
Collapse
|
30
|
Abstract
This article reviews synthetic transformations involving cleavage of a carbon-carbon bond of a four-membered ring, with a particular focus on the examples reported during the period from 2011 to the end of 2019. Most significant is the progress of catalytic reactions involving oxidative addition of carbon-carbon bonds onto transition metals or β-carbon elimination of transition metal alkoxides. When they are looked at from synthetic perspectives, they offer unique and efficient methods to build complex natural products and structures that are difficult to construct by conventional methods. On the other hand, β-scission of radical intermediates has also attracted increasing attention as an alternative elementary step to cleave carbon-carbon bonds. Its site-selectivity is often complementary to that of transition metal-catalyzed reactions. In addition, Lewis acid-mediated and thermally induced ring-opening of cyclobutanone derivatives has garnered renewed attention. On the whole, these examples demonstrate unique synthetic potentials of structurally strained four-membered ring compounds for the construction of organic skeletons.
Collapse
Affiliation(s)
- Masahiro Murakami
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | - Naoki Ishida
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto 615-8510, Japan
| |
Collapse
|
31
|
Wang R, Marichev KO, Dong K, Jensen JA, Doyle MP. Chiral 3-Acylglutaric Acid Derivatives from Strain-Induced Nucleophilic Retro-Claisen Ring-Opening Reactions. J Org Chem 2020; 85:9475-9490. [PMID: 32674577 DOI: 10.1021/acs.joc.0c01176] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A nucleophilic retro-Claisen ring-opening of donor-acceptor cyclobutenes, formed with high stereocontrol by [3 + 1]-cycloaddition of TIPS-protected enoldiazoacetates with α-acyl sulfur ylides, has been developed. Removal of the TIPS group to form the isolable β-keto ester precedes the strain-induced ring-opening. Various amines, alcohols, thiols, and amino acid derivatives are effective nucleophiles, and their products are formed in very high yields via stoichiometric reactions. The chirality of the reactant donor-acceptor cyclobutenes is fully retained in the ring-opening reactions. The 3-acylglutaric acid products are converted to various valuable structures, including amido-diols, γ-aminobutyric acid (GABA) derivatives, and heterocycles.
Collapse
Affiliation(s)
- Rui Wang
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Kostiantyn O Marichev
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Kuiyong Dong
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Joseph A Jensen
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Michael P Doyle
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| |
Collapse
|
32
|
Yan P, Zhou Q, Chen J, Lu P. Controllable Skeleton Rearrangement of
3‐Substituted
Cyclobutanones under Basic Conditions
†. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.201900510] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Peng Yan
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 China
| | - Qiang Zhou
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 China
| | - Jun Chen
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 China
| | - Ping Lu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University 220 Handan Lu Shanghai 200433 China
| |
Collapse
|
33
|
Liu D, Wang J, Liu W, Zhang F, Zhou Y. Synthesis of Polycyclic Spiro Pyrrolidone Derivatives via DBU‐Catalyzed Diastereoselective Vinylogous Aldol‐Michael Cascade Reaction. ChemCatChem 2020. [DOI: 10.1002/cctc.202000463] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Dandan Liu
- Chemistry and Environment Engineering CollegePingdingshan University Pingdingshan 475000 P. R. China
| | - Jiansheng Wang
- Chemistry and Environment Engineering CollegePingdingshan University Pingdingshan 475000 P. R. China
| | - Wenqin Liu
- School of Chemistry Chemical Engineering and Life SciencesWuhan University of Technology Wuhan 430070 P. R. China
| | - Fang‐Lin Zhang
- School of Chemistry Chemical Engineering and Life SciencesWuhan University of Technology Wuhan 430070 P. R. China
| | - Yirong Zhou
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation School of Pharmacy Tongji Medical CollegeHuazhong University of Science and Technology Wuhan 430030 P. R. China
| |
Collapse
|
34
|
Xu D, Li H, Pan G, Huang P, Oberkofler J, Reich RM, Kühn FE, Guo H. Visible-Light-Induced Dehydrohalogenative Coupling for Intramolecular α-Alkenylation: A Way to Build Seven- and Eight-Membered Rings. Org Lett 2020; 22:4372-4377. [DOI: 10.1021/acs.orglett.0c01391] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Dawen Xu
- Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200438, P.R. China
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching bei München, Germany
| | - Han Li
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching bei München, Germany
| | - Guangxing Pan
- Academic for Engineering and Technology, Fudan University, 220 Handan Road, Shanghai, 200438, P.R. China
| | - Pan Huang
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching bei München, Germany
| | - Jens Oberkofler
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching bei München, Germany
| | - Robert M. Reich
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching bei München, Germany
| | - Fritz E. Kühn
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching bei München, Germany
| | - Hao Guo
- Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200438, P.R. China
| |
Collapse
|
35
|
Yang WL, Li W, Yang ZT, Deng WP. Organocatalytic Regiodivergent Ring Expansion of Cyclobutanones for the Enantioselective Synthesis of Azepino[1,2-a]indoles and Cyclohepta[b]indoles. Org Lett 2020; 22:4026-4032. [DOI: 10.1021/acs.orglett.0c01406] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Wu-Lin Yang
- School of Pharmacy and Shanghai Key Laboratory of New Drug Design, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Wen Li
- School of Pharmacy and Shanghai Key Laboratory of New Drug Design, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Zhong-Tao Yang
- School of Pharmacy and Shanghai Key Laboratory of New Drug Design, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Wei-Ping Deng
- School of Pharmacy and Shanghai Key Laboratory of New Drug Design, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, Jinhua 321004, China
| |
Collapse
|
36
|
Clarke AK, Unsworth WP. A happy medium: the synthesis of medicinally important medium-sized rings via ring expansion. Chem Sci 2020; 11:2876-2881. [PMID: 34122787 PMCID: PMC8152702 DOI: 10.1039/d0sc00568a] [Citation(s) in RCA: 113] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Medium-sized rings have much promise in medicinal chemistry, but are difficult to make using direct cyclisation methods. In this minireview, we highlight the value of ring expansion strategies to address this long-standing synthetic challenge. We have drawn on recent progress (post 2013) to highlight the key reaction design features that enable successful ‘normal-to-medium’ ring expansion for the synthesis of these medicinally important molecular frameworks, that are currently under-represented in compound screening collections and marketed drugs in view of their challenging syntheses. Ring expansion strategies are ideally suited to make synthetically challenging, medium-sized rings with much potential in medicinal chemistry.![]()
Collapse
Affiliation(s)
- Aimee K Clarke
- Department of Chemistry, University of York York YO10 5DD UK
| | | |
Collapse
|
37
|
Asymmetric Remote Addition Reactions of Heterocycle-Based Dearomative Dienamine or Trienamine Species to 1-Azadienes: Application to Construct Chiral Azocanes and Azecanes. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901848] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
38
|
Wen KG, Peng YY, Zeng XP. Advances in the catalytic asymmetric synthesis of quaternary carbon containing cyclobutanes. Org Chem Front 2020. [DOI: 10.1039/d0qo00685h] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The advances in the catalytic asymmetric synthesis of quaternary carbon containing cyclobutanes are described.
Collapse
Affiliation(s)
- Kai-Ge Wen
- Key Laboratory of Small Functional Organic Molecule
- Ministry of Education and Jiangxi Key Laboratory of Green Chemistry
- College of Chemistry and Chemical Engineering
- Jiangxi Normal University
- Nanchang
| | - Yi-Yuan Peng
- Key Laboratory of Small Functional Organic Molecule
- Ministry of Education and Jiangxi Key Laboratory of Green Chemistry
- College of Chemistry and Chemical Engineering
- Jiangxi Normal University
- Nanchang
| | - Xing-Ping Zeng
- Key Laboratory of Small Functional Organic Molecule
- Ministry of Education and Jiangxi Key Laboratory of Green Chemistry
- College of Chemistry and Chemical Engineering
- Jiangxi Normal University
- Nanchang
| |
Collapse
|
39
|
Jiang B, Du W, Chen YC. Modified cinchona alkaloid-catalysed enantioselective [4+4] annulations of cyclobutenones and 1-azadienes. Chem Commun (Camb) 2020; 56:7257-7260. [PMID: 32469011 DOI: 10.1039/d0cc02836c] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An asymmetric [4+4] annulation reaction between β-substituted cyclobutenones and diverse 1-azadienes is developed under the catalysis of modified cinchona alkaloids.
Collapse
Affiliation(s)
- Bo Jiang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology
- West China School of Pharmacy
- Sichuan University
- Chengdu 610041
- China
| | - Wei Du
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology
- West China School of Pharmacy
- Sichuan University
- Chengdu 610041
- China
| | - Ying-Chun Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology
- West China School of Pharmacy
- Sichuan University
- Chengdu 610041
- China
| |
Collapse
|
40
|
Dierks A, Tönjes J, Schmidtmann M, Christoffers J. Synthesis of Benzo[b]azocin-2-ones by Aryl Amination and Ring-Expansion of α-(Iodophenyl)-β-oxoesters. Chemistry 2019; 25:14912-14920. [PMID: 31433088 PMCID: PMC6899745 DOI: 10.1002/chem.201903139] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Indexed: 01/16/2023]
Abstract
Transformation of β-oxoesters with PhI(OCOCF3 )2 leads to α-(ortho-iodophenyl)-β-oxoesters. These materials are the starting point for the synthesis of 6-carboxybenzo[b]azocin-2-ones by a sequence of aryl amination and ring transformation. This reaction sequence starts with copper-catalyzed formation of N-alkyl anilines from the iodoarenes and primary amines in the presence of K3 PO4 as stoichiometric base. The intermediate products underwent ring transformation by addition of the nitrogen into the carbonyl group of the cycloalkanone, furnishing benzo-annulated eight-membered ring lactams. Under the same reaction conditions, the cyclohexanone and cycloheptanone derivatives gave no aminated products, but ring-transformed to benzofuran derivatives. The title compounds of this investigation contain two points for further diversification (the lactam nitrogen and the carboxylate function), thus, the suitability of this compound class as a scaffold was proven by appropriate functionalizations. The first series of derivatizations of the scaffold was initiated by hydrogenolytic debenzylation of N-benzyl derivative to provide the NH-congener, which could be deprotonated with LDA and alkylated at nitrogen to give further examples of this compound class. Secondly, the ester function was submitted to saponification and the resulting carboxylic acid could be amidated using HATU as coupling reagent to furnish different amides.
Collapse
Affiliation(s)
- Anna Dierks
- Institut für ChemieCarl von Ossietzky Universität Oldenburg26111OldenburgGermany
| | - Jan Tönjes
- Institut für ChemieCarl von Ossietzky Universität Oldenburg26111OldenburgGermany
| | - Marc Schmidtmann
- Institut für ChemieCarl von Ossietzky Universität Oldenburg26111OldenburgGermany
| | - Jens Christoffers
- Institut für ChemieCarl von Ossietzky Universität Oldenburg26111OldenburgGermany
| |
Collapse
|
41
|
Lawer A, Rossi‐Ashton JA, Stephens TC, Challis BJ, Epton RG, Lynam JM, Unsworth WP. Internal Nucleophilic Catalyst Mediated Cyclisation/Ring Expansion Cascades for the Synthesis of Medium‐Sized Lactones and Lactams. Angew Chem Int Ed Engl 2019; 58:13942-13947. [DOI: 10.1002/anie.201907206] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 07/23/2019] [Indexed: 12/12/2022]
|
42
|
Lawer A, Rossi‐Ashton JA, Stephens TC, Challis BJ, Epton RG, Lynam JM, Unsworth WP. Internal Nucleophilic Catalyst Mediated Cyclisation/Ring Expansion Cascades for the Synthesis of Medium‐Sized Lactones and Lactams. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201907206] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
43
|
Stereoselective synthesis of medium lactams enabled by metal-free hydroalkoxylation/stereospecific [1,3]-rearrangement. Nat Commun 2019; 10:3234. [PMID: 31324800 PMCID: PMC6642132 DOI: 10.1038/s41467-019-11245-2] [Citation(s) in RCA: 89] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Accepted: 07/02/2019] [Indexed: 12/23/2022] Open
Abstract
Rearrangement reactions have attracted considerable interest over the past decades due to their high bond-forming efficiency and atom economy in the construction of complex organic architectures. In contrast to the well-established [3,3]-rearrangement, [1,3] O-to-C rearrangement has been far less vigorously investigated, and stereospecific [1,3]-rearrangement is extremely rare. Here, we report a metal-free intramolecular hydroalkoxylation/[1,3]-rearrangement, leading to the practical and atom-economical assembly of various valuable medium-sized lactams with wide substrate scope and excellent diastereoselectivity. Moreover, such an asymmetric cascade cyclization has also been realized by chiral Brønsted acid-catalyzed kinetic resolution. In addition, biological tests reveal that some of these medium-sized lactams displayed their bioactivity as antitumor agents against melanoma cells, esophageal cancer cells and breast cancer cells. A mechanistic rationale for the reaction is further supported by control experiments and theoretical calculations. Stereospecific [1,3]-rearrangements are rarely reported method to efficiently build complex organic architectures. Here, the authors describe a metal-free intramolecular hydroalkoxylation/[1,3]-rearrangement sequence affording medium-sized lactams with wide scope, also in an asymmetric fashion.
Collapse
|
44
|
Ghisu L, Melis N, Serusi L, Luridiana A, Soddu F, Secci F, Caboni P, Guillot R, Aitken DJ, Frongia A. Synthesis of β-sulfinyl cyclobutane carboxylic amides via a formal α to β sulphoxide migration process. Org Biomol Chem 2019; 17:6143-6147. [PMID: 31180093 DOI: 10.1039/c9ob00758j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
An original tandem reaction consisting of a thermal elimination-addition process was developed. Highly substituted β-sulfinyl cyclobutane carboxylic acid derivatives were obtained from isomeric α-sulfinyl derivatives in a single operation in good to high yields and with high trans diastereoselectivity.
Collapse
Affiliation(s)
- Lorenza Ghisu
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Complesso Universitario di Monserrato, S.S. 554, Bivio per Sestu, I-09042, Monserrato, Cagliari, Italy.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Sherwood J, Granelli J, McElroy CR, Clark JH. A Method of Calculating the Kamlet-Abboud-Taft Solvatochromic Parameters Using COSMO-RS. Molecules 2019; 24:molecules24122209. [PMID: 31200457 PMCID: PMC6630472 DOI: 10.3390/molecules24122209] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 06/07/2019] [Accepted: 06/11/2019] [Indexed: 01/31/2023] Open
Abstract
There is demand for safer and bio-based solvents, brought on by legislation and sustainability objectives. The prediction of physical properties is highly desirable to help design new molecules. Here we present an in silico approach to obtain calculated Kamlet-Abboud-Taft solvatochromic parameters using virtual experiments. The tautomerisation equilibrium of methyl acetoacetate and dimedone was calculated in different solvents with COSMO-RS theory and converted into estimates of solvent dipolarity and hydrogen bond accepting ability, respectively. Hydrogen bond donating ability was calculated as a function of the electron deficient surface area on protic solvents. These polarity descriptors correlate with rate constants and equilibria, and so ability of calculated Kamlet-Abboud-Taft solvatochromic parameters to recreate experimental free energy relationships was tested with sixteen case studies taken from the literature. The accuracy of the calculated parameters was also satisfactory for solvent selection, as demonstrated with a 1,4-addition reaction and a multicomponent heterocycle synthesis.
Collapse
Affiliation(s)
- James Sherwood
- Green Chemistry Centre of Excellence, Department of Chemistry, University of York, Heslington, North Yorkshire YO10 5DD, UK.
| | - Joe Granelli
- Green Chemistry Centre of Excellence, Department of Chemistry, University of York, Heslington, North Yorkshire YO10 5DD, UK.
| | - Con R McElroy
- Green Chemistry Centre of Excellence, Department of Chemistry, University of York, Heslington, North Yorkshire YO10 5DD, UK.
| | - James H Clark
- Green Chemistry Centre of Excellence, Department of Chemistry, University of York, Heslington, North Yorkshire YO10 5DD, UK.
| |
Collapse
|
46
|
Wei Y, Ren Y, Mailhol D, Rajzmann M, Rodriguez J, Coquerel Y. An Organocatalytic Two‐atom Ring Expansion Approach to Optically Active Glutarimides. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900159] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Yun‐Long Wei
- Aix Marseille UniversitéCNRS, Centrale Marseille, iSm2 13397 Marseille France
| | - Yajun Ren
- Aix Marseille UniversitéCNRS, Centrale Marseille, iSm2 13397 Marseille France
| | - Damien Mailhol
- Aix Marseille UniversitéCNRS, Centrale Marseille, iSm2 13397 Marseille France
| | - Michel Rajzmann
- Aix Marseille UniversitéCNRS, Centrale Marseille, iSm2 13397 Marseille France
| | - Jean Rodriguez
- Aix Marseille UniversitéCNRS, Centrale Marseille, iSm2 13397 Marseille France
| | - Yoann Coquerel
- Aix Marseille UniversitéCNRS, Centrale Marseille, iSm2 13397 Marseille France
| |
Collapse
|
47
|
Wu A, Feng Q, Sung HHY, Williams ID, Sun J. Synthesis of Eight‐Membered Lactams through Formal [6+2] Cyclization of Siloxy Alkynes and Vinylazetidines. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201902866] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- An Wu
- Department of ChemistryThe Hong Kong University of Science and Technology Clear Water Bay Kowloon, Hong Kong SAR China
| | - Qiang Feng
- Department of ChemistryThe Hong Kong University of Science and Technology Clear Water Bay Kowloon, Hong Kong SAR China
| | - Herman H. Y. Sung
- Department of ChemistryThe Hong Kong University of Science and Technology Clear Water Bay Kowloon, Hong Kong SAR China
| | - Ian D. Williams
- Department of ChemistryThe Hong Kong University of Science and Technology Clear Water Bay Kowloon, Hong Kong SAR China
| | - Jianwei Sun
- Department of ChemistryThe Hong Kong University of Science and Technology Clear Water Bay Kowloon, Hong Kong SAR China
| |
Collapse
|
48
|
Wu A, Feng Q, Sung HHY, Williams ID, Sun J. Synthesis of Eight-Membered Lactams through Formal [6+2] Cyclization of Siloxy Alkynes and Vinylazetidines. Angew Chem Int Ed Engl 2019; 58:6776-6780. [PMID: 30888103 DOI: 10.1002/anie.201902866] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Indexed: 12/31/2022]
Abstract
A new approach for the efficient synthesis of eight-membered lactams through formal [6+2] cyclization of siloxy alkynes and vinylazetidines has been developed. Evidence from a chirality transfer experiment suggests that the reaction proceeds via a [3,3]-sigmatropic rearrangement from a ketene intermediate. This insight led to the development of alternative conditions and use of acyl chlorides as ketene precursors for the [6+2] reaction with vinylazetidines.
Collapse
Affiliation(s)
- An Wu
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Qiang Feng
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Herman H Y Sung
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Ian D Williams
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Jianwei Sun
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| |
Collapse
|