1
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Abstract
An effective Pd-catalyzed regioselective hydroesterification of 1,3-conjugated enynes with aryl formates was developed. Under the Pd-CyDPEphos catalytic system, the conjugated enynes reacted with phenyl formates and selectively provided the 2-ester-substituted 1,3-dienes in good yields with excellent regioselectivities.
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Affiliation(s)
- Xia-Bin Xiang
- Division of Applied Chemistry, School of Natural Sciences, Anhui Agricultural University, Hefei, Anhui 230036, P. R. China
| | - Sheng Wang
- Division of Applied Chemistry, School of Natural Sciences, Anhui Agricultural University, Hefei, Anhui 230036, P. R. China
| | - Teng Xu
- Division of Applied Chemistry, School of Natural Sciences, Anhui Agricultural University, Hefei, Anhui 230036, P. R. China
| | - Shanshan Chen
- Division of Applied Chemistry, School of Natural Sciences, Anhui Agricultural University, Hefei, Anhui 230036, P. R. China
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2
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Chauhan ANS, Mali G, Erande RD. Regioselectivity Switch Towards the Development of Innovative Diels‐Alder Cycloaddition and Productive Applications in Organic Synthesis. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202100793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Amar Nath Singh Chauhan
- IIT Jodhpur: Indian Institute of Technology Jodhpur Chemistry Chemistry departmentIIT Jodhpur 342037 Jodhpur INDIA
| | - Ghanshyam Mali
- IIT Jodhpur: Indian Institute of Technology Jodhpur chemistry Chemistry departmentIIT Jodhpur 342037 Jodhpur INDIA
| | - Rohan D. Erande
- Indian Institute of Technology Jodhpur Chemistry Office 103, Department of Chemistry, IIT Jodhpur, N.H. 62, Nagaur Road, Karwar 342037 Jodhpur INDIA
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3
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Abaee MS, Mohammadi M, Mansoori A, Mojtahedi MM, Pirouz M, Halvagar MR. Unusual
In‐Situ
Preorganization and Postoxidation Steps Observed in Diels‐Alder Reactions of Styrylcyclohexene Dienes. ChemistrySelect 2021. [DOI: 10.1002/slct.202102336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- M. Saeed Abaee
- Department of Organic Chemistry and Natural Products Chemistry and Chemical Engineering Research Center of Iran
| | - Mohadesseh Mohammadi
- Department of Organic Chemistry and Natural Products Chemistry and Chemical Engineering Research Center of Iran
| | - Atiyeh Mansoori
- Department of Organic Chemistry and Natural Products Chemistry and Chemical Engineering Research Center of Iran
| | - Mohammad M. Mojtahedi
- Department of Organic Chemistry and Natural Products Chemistry and Chemical Engineering Research Center of Iran
| | - Maryam Pirouz
- Department of Organic Chemistry and Natural Products Chemistry and Chemical Engineering Research Center of Iran
| | - Mohammad R. Halvagar
- Department of Organic Chemistry and Natural Products Chemistry and Chemical Engineering Research Center of Iran
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4
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Strominger AM, Sutherland BL, Flemming AS, Dutmer BC, Gilbert TM. Additivity of Diene Substituent Gibbs Free Energy Contributions for Diels-Alder Reactions between (F 3C) 2B = NMe 2 and Substituted Cyclopentadienes. J Phys Chem A 2021; 125:5456-5469. [PMID: 34110819 DOI: 10.1021/acs.jpca.1c02880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Systematic computational studies of pericyclic Diels-Alder-type reactions between aminoborane (F3C)2B = N(CH3)2, 1, and all permutations of substituted cyclopentadienes c-C5R1R2R3R4R5aR5b (R = H, CH3, CF3, F) allow isolation of substitutional effects on Gibbs free energy barrier heights and reaction Gibbs free energies. The effects appear to be additive in all cases. Substitution at positions 5a and 5b always increases barriers and reaction energies, an effect explained by steric interactions between substituents and the aminoborane moiety. For cases R = CH3, regioselectivities differ from those expected from canonical organic chemistry predictions. Frontier molecular orbital calculations suggest this arises from the extreme polarization of the π interaction in 1. For cases R = CF3, the 2/3-substitution comparison accords with canon, but the 1/4-substitution comparison does not. This appears to arise from a combination of electronic and steric issues. For cases R = F, many of the reactions are exergonic, in contrast to the cases R = CH3, CF3. Additionally, fluorine substitution at positions 2 and 4 has a barrier-lowering effect. Frontier molecular orbital calculations support an orbital-based preference for formation of 2- and 4-substituted "meta" products rather than "ortho/para" products.
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Affiliation(s)
- Abbygale M Strominger
- Department of Chemistry, Highland Community College, Freeport, Illinois 61032, United States
| | - Brooke L Sutherland
- Department of Chemistry, Highland Community College, Freeport, Illinois 61032, United States
| | - Austin S Flemming
- Department of Chemistry, Highland Community College, Freeport, Illinois 61032, United States
| | - Brendan C Dutmer
- Department of Chemistry, Highland Community College, Freeport, Illinois 61032, United States
| | - Thomas M Gilbert
- Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, Illinois 60115, United States
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5
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Taherinia D, Mahmoodi MM, Fattahi A. Theoretical investigation of the effect of hydrogen bonding on the stereoselectivity of the Diels–Alder reaction. NEW J CHEM 2021. [DOI: 10.1039/d1nj01373d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Here, we report the computational prediction of high exo selectivities in a series of Diels–Alder reactions with H-bonding interaction.
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Affiliation(s)
- Davood Taherinia
- Department of Chemistry, Sharif University of Technology, Tehran 11155-9516, Iran
| | - M. Mohsen Mahmoodi
- Department of Chemistry, Sharif University of Technology, Tehran 11155-9516, Iran
| | - Alireza Fattahi
- Department of Chemistry, Sharif University of Technology, Tehran 11155-9516, Iran
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6
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Sultan MA, Galil MSA, Al-qubati M, Omar MM, Barakat A. Synthesis, Molecular Docking, Druglikeness Analysis, and ADMET Prediction of the Chlorinated Ethanoanthracene Derivatives as Possible Antidepressant Agents. Applied Sciences 2020; 10:7727. [DOI: 10.3390/app10217727] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Ethanoanthracene cycloadducts (5–7) anti, (5–7) syn, and (5–7) dec have been synthesized from the Diels–Alder (DA) reaction of diene 1,8-dichloroanthracene 2, with the dienophiles; acrylonitrile 3, 1-cynavinyl acetate 4, and phenyl vinyl sulfone 5, individually. The steric effect of dienophile substituents were more favorable toward the anti-isomer formation as deduced from 1H-NMR spectrum. The cheminformatics prediction for (5–7) anti and (5–7) syn was investigated. The in silico anticipated anti-depression activity of the (5–7) anti and (5–7) syn compounds were investigated and compared to maprotiline 9 as reference anti-depressant drug. The study showed that steric interactions play a crucial role in the binding affinity of these compounds to the representative models; 4xnx, 2QJU, and 3GWU. The pharmacokinetic and drug-like properties of (5–7) anti and (5–7) syn exhibited that these compounds could be represented as potential candidates for further development into antidepressant-like agents.
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7
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Stewart SG, Harfoot GJ, McRae KJ, Teng Y, Yu LJ, Chen B, Cammi R, Coote ML, Banwell MG, Willis AC. High-Pressure-Promoted and Facially Selective Diels–Alder Reactions of Enzymatically Derived cis-1,2-Dihydrocatechols and Their Acetonide Derivatives: Enantiodivergent Routes to Homochiral and Polyfunctionalized Bicyclo[2.2.2]octenes. J Org Chem 2020; 85:13080-13095. [DOI: 10.1021/acs.joc.0c01767] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Scott G. Stewart
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601 Australia
| | - Gwion J. Harfoot
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601 Australia
| | - Kenneth J. McRae
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601 Australia
| | - Yinglai Teng
- Institute for Advanced and Applied Chemical Synthesis, Jinan University, Guangzhou 510632, China
| | - Li-Juan Yu
- Research School of Chemistry, Institute of Advanced Studies and ARC Centre of Excellence for Electromaterials Science, Research School of Chemistry, The Australian National University, Canberra, ACT 2601 Australia
| | - Bo Chen
- Donostia International Physics Center, Paseo Manuel de Lardizabal, 4, 20018 Donostia-San Sebastian, Spain
- IKERBASQUE, Basque Foundation for Science, Maria Diaz de Haro 3, 48013 Bilbao, Spain
| | - Roberto Cammi
- Department of Chemical Science, Life Science and Environmental Sustainability, University of Parma, I-43100 Parma, Italy
| | - Michelle L. Coote
- Research School of Chemistry, Institute of Advanced Studies and ARC Centre of Excellence for Electromaterials Science, Research School of Chemistry, The Australian National University, Canberra, ACT 2601 Australia
| | - Martin G. Banwell
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601 Australia
- Institute for Advanced and Applied Chemical Synthesis, Jinan University, Guangzhou 510632, China
| | - Anthony C. Willis
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601 Australia
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8
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Xu WL, Hu W, Zhao WM, Wang M, Chen J, Zhou L. Copper(I)/DDQ-Mediated Double-Dehydrogenative Diels-Alder Reaction of Aryl Butenes with 1,4-Diketones and Indolones. Org Lett 2020; 22:7169-7174. [PMID: 32902298 DOI: 10.1021/acs.orglett.0c02486] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A copper(I)/DDQ-mediated double-dehydrogenative Diels-Alder (DDDA) reaction of simple butenes with 1,4-diketones and indolones has been established for the first time. This strategy is based on a tandem double-dehydrogenation/Diels-Alder reaction from nonprefunctionalized starting materials, in which both a diene and dienophile were in situ generated via activation of fourfold inert C(sp3)-H bonds in one catalytic system.
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Affiliation(s)
- Wen-Lei Xu
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, Department of Chemistry & Materials Science, National Demonstration Center for Experimental Chemistry Education, Northwest University, Xi'an 710127, P. R. China
| | - Wei Hu
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, Department of Chemistry & Materials Science, National Demonstration Center for Experimental Chemistry Education, Northwest University, Xi'an 710127, P. R. China
| | - Wei-Ming Zhao
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, Department of Chemistry & Materials Science, National Demonstration Center for Experimental Chemistry Education, Northwest University, Xi'an 710127, P. R. China
| | - Min Wang
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, Department of Chemistry & Materials Science, National Demonstration Center for Experimental Chemistry Education, Northwest University, Xi'an 710127, P. R. China
| | - Jie Chen
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, Department of Chemistry & Materials Science, National Demonstration Center for Experimental Chemistry Education, Northwest University, Xi'an 710127, P. R. China
| | - Ling Zhou
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, Department of Chemistry & Materials Science, National Demonstration Center for Experimental Chemistry Education, Northwest University, Xi'an 710127, P. R. China
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9
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Uemura N, Toyoda S, Shimizu W, Yoshida Y, Mino T, Sakamoto M. Absolute Asymmetric Synthesis Involving Chiral Symmetry Breaking in Diels–Alder Reaction. Symmetry (Basel) 2020; 12:910. [DOI: 10.3390/sym12060910] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Efficient generation and amplification of chirality from prochiral substrates in the Diels–Alder reaction (DA reaction) followed by dynamic crystallization were achieved without using an external chiral source. Since the DA reaction of 2-methylfuran and various maleimides proceeds reversibly, an exo-adduct was obtained as the main product as the reaction proceeded. From single crystal X-ray structure analysis, it was found that five of ten exo-adducts gave conglomerates. When 2-methylfuran and various maleimides with a catalytic amount of TFA were reacted in a sealed tube, the exo-DA adducts were precipitated from the solution, while the reaction mixtures were continuously ground and stirred using glass beads. Deracemization occurred and chiral amplification was observed for four of the substrates. Each final enantiomeric purity was influenced by the crystal structure, and when enantiomers were included in the disorder, they reached an enantiomeric purity reflecting the ratio of the disorder. The final ee value of the 3,5-dimethylphenyl derivative after chiral amplification was 98% ee.
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10
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Marques A, Duhail T, Marrot J, Chataigner I, Coeffard V, Vincent G, Moreau X. A Fused Hexacyclic Ring System: Diastereoselective Polycyclization of 2,4‐Dienals through an Interrupted iso‐Nazarov Reaction. Angew Chem Int Ed Engl 2019; 58:9969-9973. [DOI: 10.1002/anie.201903860] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 05/06/2019] [Indexed: 11/10/2022]
Affiliation(s)
- Anne‐Sophie Marques
- Institut Lavoisier VersaillesUniversité de Versailles-St-Quentin-en-YvelinesUniversité Paris Saclay, UMR CNRS 8180 78035 Versailles cedex France
| | - Thibaut Duhail
- Institut Lavoisier VersaillesUniversité de Versailles-St-Quentin-en-YvelinesUniversité Paris Saclay, UMR CNRS 8180 78035 Versailles cedex France
| | - Jérome Marrot
- Institut Lavoisier VersaillesUniversité de Versailles-St-Quentin-en-YvelinesUniversité Paris Saclay, UMR CNRS 8180 78035 Versailles cedex France
| | - Isabelle Chataigner
- Normandie UnivUNIROUENINSA Rouen, CNRS, COBRA (UMR 6014) 76000 Rouen France
- Present address: Sorbonne UniversitéUPMC Univ. Paris 6, CNRS UMR 7616Laboratoire de Chimie Théorique 75005 Paris France
| | - Vincent Coeffard
- Université de Nantes, CNRSChimie Et Interdisciplinarité: Synthèse, Analyse et Modélisation (CEISAM), UMR CNRS 6230Faculté des Sciences et des Techniques 2, rue de la Houssinière, BP 92208 44322 Nantes Cedex 3 France
| | - Guillaume Vincent
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO)Univ. Paris-Sud, Université Paris-Saclay, CNRS UMR 8182 91405 Orsay cedex France
| | - Xavier Moreau
- Institut Lavoisier VersaillesUniversité de Versailles-St-Quentin-en-YvelinesUniversité Paris Saclay, UMR CNRS 8180 78035 Versailles cedex France
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11
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Marques A, Duhail T, Marrot J, Chataigner I, Coeffard V, Vincent G, Moreau X. A Fused Hexacyclic Ring System: Diastereoselective Polycyclization of 2,4‐Dienals through an Interrupted iso‐Nazarov Reaction. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903860] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Anne‐Sophie Marques
- Institut Lavoisier VersaillesUniversité de Versailles-St-Quentin-en-YvelinesUniversité Paris Saclay, UMR CNRS 8180 78035 Versailles cedex France
| | - Thibaut Duhail
- Institut Lavoisier VersaillesUniversité de Versailles-St-Quentin-en-YvelinesUniversité Paris Saclay, UMR CNRS 8180 78035 Versailles cedex France
| | - Jérome Marrot
- Institut Lavoisier VersaillesUniversité de Versailles-St-Quentin-en-YvelinesUniversité Paris Saclay, UMR CNRS 8180 78035 Versailles cedex France
| | - Isabelle Chataigner
- Normandie UnivUNIROUENINSA Rouen, CNRS, COBRA (UMR 6014) 76000 Rouen France
- Present address: Sorbonne UniversitéUPMC Univ. Paris 6, CNRS UMR 7616Laboratoire de Chimie Théorique 75005 Paris France
| | - Vincent Coeffard
- Université de Nantes, CNRSChimie Et Interdisciplinarité: Synthèse, Analyse et Modélisation (CEISAM), UMR CNRS 6230Faculté des Sciences et des Techniques 2, rue de la Houssinière, BP 92208 44322 Nantes Cedex 3 France
| | - Guillaume Vincent
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO)Univ. Paris-Sud, Université Paris-Saclay, CNRS UMR 8182 91405 Orsay cedex France
| | - Xavier Moreau
- Institut Lavoisier VersaillesUniversité de Versailles-St-Quentin-en-YvelinesUniversité Paris Saclay, UMR CNRS 8180 78035 Versailles cedex France
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12
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Zhu C, Ji X, You D, Chen TL, Mu AU, Barker KP, Klivansky LM, Liu Y, Fang L. Extraordinary Redox Activities in Ladder-Type Conjugated Molecules Enabled by B ← N Coordination-Promoted Delocalization and Hyperconjugation. J Am Chem Soc 2018; 140:18173-18182. [PMID: 30507169 DOI: 10.1021/jacs.8b11337] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The introduction of B ← N coordinate bond-isoelectronic to C-C single bond-into π-systems represents a promising strategy to impart exotic redox and electrochromic properties into conjugated organic molecules and macromolecules. To achieve both reductive and oxidative activities using this strategy, a cruciform ladder-type molecular constitution was designed to accommodate oxidation-active, reduction-active, and B ← N coordination units into a compact structure. Two such compounds (BN-F and BN-Ph) were synthesized via highly efficient N-directed borylation. These molecules demonstrated well-separated, two reductive and two oxidative electron-transfer processes, corresponding to five distinct yet stable oxidation states, including a rarely observed boron-containing radical cation. Spectroelectrochemical measurements revealed unique optical characteristics for each of these reduced/oxidized species, demonstrating multicolor electrochromism with excellent recyclability. Distinct color changes were observed between each redox state with clear isosbestic points on the absorption spectra. The underlying redox mechanism was elucidated by a combination of computational and experimental investigations. Single-crystal X-ray diffraction analysis on the neutral state, the oxidized radical cation, and the reduced dianion of BN-Ph revealed structural transformations into two distinct quinonoid constitutions during the oxidation and reduction processes, respectively. B ← N coordination played an important role in rendering the robust and reversible multistage redox properties, by extending the charge and spin delocalization, by modulating the π-electron density, and by a newly established hyperconjugation mechanism.
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Affiliation(s)
| | | | | | - Teresa L Chen
- The Molecular Foundry , Lawrence Berkeley National Laboratory , One Cyclotron Road, Berkeley , California 94720 , United States
| | | | | | - Liana M Klivansky
- The Molecular Foundry , Lawrence Berkeley National Laboratory , One Cyclotron Road, Berkeley , California 94720 , United States
| | - Yi Liu
- The Molecular Foundry , Lawrence Berkeley National Laboratory , One Cyclotron Road, Berkeley , California 94720 , United States
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13
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Pedrón M, Delso I, Tejero T, Merino P. Concerted Albeit Not Pericyclic Cycloadditions: Understanding the Mechanism of the (4+3) Cycloaddition between Nitrones and 1,2‐Diaza‐1,3‐dienes. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800663] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Manuel Pedrón
- Instituto de Biocomputación y Física de Sistemas Complejos (BIFI). Universidad de Zaragoza 50009 Zaragoza Spain
| | - Ignacio Delso
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH). Universidad de Zaragoza‐CSIC 50009 Zaragoza Spain
| | - Tomás Tejero
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH). Universidad de Zaragoza‐CSIC 50009 Zaragoza Spain
| | - Pedro Merino
- Instituto de Biocomputación y Física de Sistemas Complejos (BIFI). Universidad de Zaragoza 50009 Zaragoza Spain
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14
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Uemura N, Toyoda S, Ishikawa H, Yoshida Y, Mino T, Kasashima Y, Sakamoto M. Asymmetric Diels–Alder Reaction Involving Dynamic Enantioselective Crystallization. J Org Chem 2018; 83:9300-9304. [DOI: 10.1021/acs.joc.8b01273] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Naohiro Uemura
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, and Molecular Chirality Research Center, Yayoi-cho, Inage-ku, Chiba 265-8522, Japan
| | - Seiya Toyoda
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, and Molecular Chirality Research Center, Yayoi-cho, Inage-ku, Chiba 265-8522, Japan
| | - Hiroki Ishikawa
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, and Molecular Chirality Research Center, Yayoi-cho, Inage-ku, Chiba 265-8522, Japan
| | - Yasushi Yoshida
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, and Molecular Chirality Research Center, Yayoi-cho, Inage-ku, Chiba 265-8522, Japan
| | - Takashi Mino
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, and Molecular Chirality Research Center, Yayoi-cho, Inage-ku, Chiba 265-8522, Japan
| | - Yoshio Kasashima
- Education Center, Faculty of Creative Engineering, Chiba Institute of Technology, Shibazono, Narashino, Chiba 275-0023, Japan
| | - Masami Sakamoto
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, and Molecular Chirality Research Center, Yayoi-cho, Inage-ku, Chiba 265-8522, Japan
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15
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Abstract
A practical and effective copper-catalyzed dehydrogenative Diels-Alder reaction of gem-diesters and ketone with dienes has been established. The active dienophiles were generated in situ via a radical-based dehydrogenation process, which reacted with a wide variety of dienes to afford various polysubstituted cyclohexene derivatives in good to excellent yields.
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Affiliation(s)
- Bing Jiang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry , University of Science and Technology of China , Hefei 230026 , China
| | - Qiu-Ju Liang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry , University of Science and Technology of China , Hefei 230026 , China
| | - Yu Han
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry , University of Science and Technology of China , Hefei 230026 , China
| | - Meng Zhao
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry , University of Science and Technology of China , Hefei 230026 , China
| | - Yun-He Xu
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry , University of Science and Technology of China , Hefei 230026 , China
| | - Teck-Peng Loh
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry , University of Science and Technology of China , Hefei 230026 , China.,Institute of Advanced Synthesis, Jiangsu National Synergetic Innovation Center for Advanced Materials , Nanjing Tech University , Nanjing 210009 , P. R. China.,Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences , Nanyang Technological University , Singapore 637371
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16
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Marques AS, Marrot J, Chataigner I, Coeffard V, Vincent G, Moreau X. In Situ Generation of Cyclopentadienol Intermediates from 2,4-Dienals. Application to the Synthesis of Spirooxindoles via a Domino Polycyclization. Org Lett 2018; 20:792-795. [DOI: 10.1021/acs.orglett.7b03934] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Anne-Sophie Marques
- Institut
Lavoisier Versailles, UMR CNRS 8180, Université de Versailles-St-Quentin-en-Yvelines, Université Paris Saclay, 45 Avenue des États-Unis, Versailles 78035 Cedex, France
| | - Jérôme Marrot
- Institut
Lavoisier Versailles, UMR CNRS 8180, Université de Versailles-St-Quentin-en-Yvelines, Université Paris Saclay, 45 Avenue des États-Unis, Versailles 78035 Cedex, France
| | - Isabelle Chataigner
- Normandie Univ, UNIROUEN, INSA
Rouen, CNRS, COBRA (UMR 6014), 76000 Rouen, France
| | - Vincent Coeffard
- Université de Nantes, CNRS, Chimie Et Interdisciplinarité:
Synthèse, Analyse et Modélisation (CEISAM), UMR CNRS
6230, Faculté des Sciences et des Techniques, 2, rue de la Houssinière, BP 92208, Nantes 44322 Cedex 3, France
| | - Guillaume Vincent
- Institut
de Chimie Moléculaire et des Matériaux d’Orsay
(ICMMO), Université Paris-Sud, Université Paris-Saclay, CNRS UMR
8182, Orsay 91405 Cedex, France
| | - Xavier Moreau
- Institut
Lavoisier Versailles, UMR CNRS 8180, Université de Versailles-St-Quentin-en-Yvelines, Université Paris Saclay, 45 Avenue des États-Unis, Versailles 78035 Cedex, France
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17
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Chennapuram M, Subba Reddy UV, Seki C, Okuyama Y, Kwon E, Uwai K, Tokiwa M, Takeshita M, Nakano H. Hybrid-Type Squaramide-Fused Amino Alcohol Organocatalysts for Enantioselective Diels-Alder Reactions of 3-Hydroxy-2-Pyridones with Maleimides. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700830] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Madhu Chennapuram
- Division of Sustainable and Environmental Engineering; Graduate School of Engineering; Muroran Institute of Technology; 27-1 Mizumoto-cho 050-8585 Muroran Japan
| | - U. V. Subba Reddy
- Division of Sustainable and Environmental Engineering; Graduate School of Engineering; Muroran Institute of Technology; 27-1 Mizumoto-cho 050-8585 Muroran Japan
| | - Chigusa Seki
- Division of Sustainable and Environmental Engineering; Graduate School of Engineering; Muroran Institute of Technology; 27-1 Mizumoto-cho 050-8585 Muroran Japan
| | - Yuko Okuyama
- Tohoku Medical and Pharmaceutical University; 4-4-1 Komatsushima, Aoba-ku 981-8558 Sendai Japan
| | - Eunsang Kwon
- Research and Analytical Centre for Giant Molecules; Graduate School of Sciences; Tohoku University; 6-3 Aoba, Aramaki, Aoba-ku 980-8578 Sendai Japan
| | - Koji Uwai
- Division of Sustainable and Environmental Engineering; Graduate School of Engineering; Muroran Institute of Technology; 27-1 Mizumoto-cho 050-8585 Muroran Japan
| | - Michio Tokiwa
- Tokiwakai Group; 62 Numajiri, Tsuduri-chou Uchigo 973-8053 Iwaki Japan
| | | | - Hiroto Nakano
- Division of Sustainable and Environmental Engineering; Graduate School of Engineering; Muroran Institute of Technology; 27-1 Mizumoto-cho 050-8585 Muroran Japan
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18
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Sun R, Song W, Ma C, Zhang H, Yu X. Titanium(IV) Chloride-Mediated Stereoselective α-Alkylidenation to Efficiently Assemble Multisubstituted 1,3-Dienes. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201601025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Rengwei Sun
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy; East China University of Science & Technology; Shanghai 200237 People's Republic of China, Fax: (+86)-21-6425-1033; phone: (+86)-21-6425-2604
| | - Wei Song
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy; East China University of Science & Technology; Shanghai 200237 People's Republic of China, Fax: (+86)-21-6425-1033; phone: (+86)-21-6425-2604
| | - Chunmei Ma
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy; East China University of Science & Technology; Shanghai 200237 People's Republic of China, Fax: (+86)-21-6425-1033; phone: (+86)-21-6425-2604
| | - Huiwen Zhang
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy; East China University of Science & Technology; Shanghai 200237 People's Republic of China, Fax: (+86)-21-6425-1033; phone: (+86)-21-6425-2604
| | - Xinhong Yu
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy; East China University of Science & Technology; Shanghai 200237 People's Republic of China, Fax: (+86)-21-6425-1033; phone: (+86)-21-6425-2604
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19
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Sultan MA, Karama U, Almansour AI, Soliman SM. Theoretical Study on Regioselectivity of the Diels-Alder Reaction between 1,8-Dichloroanthracene and Acrolein. Molecules 2016; 21:molecules21101277. [PMID: 27669204 PMCID: PMC6272940 DOI: 10.3390/molecules21101277] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/21/2016] [Revised: 09/15/2016] [Accepted: 09/17/2016] [Indexed: 11/23/2022]
Abstract
A theoretical study of the regioselectivity of the Diels-Alder reaction between 1,8-dichloroanthracene and acrolein is performed using DFT at the B3LYP/6-31G(d,p) level of theory. The FMO analysis, global and local reactivity indices confirmed the reported experimental results. Potential energy surface analysis showed that the cycloadditions (CAs) favor the formation of the anti product. These results are in good agreement with the reported results obtained experimentally where the anti is the major product.
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Affiliation(s)
- Mujeeb A Sultan
- Chemistry Department, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
| | - Usama Karama
- Chemistry Department, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
| | - Abdulrahman I Almansour
- Chemistry Department, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
| | - Saied M Soliman
- Department of Chemistry, Rabigh College of Science and Art, P.O. Box 344, Rabigh 21911, Saudi Arabia.
- Department of Chemistry, Faculty of Science, Alexandria University, P.O. Box 426, Ibrahimia, Alexandria 21321, Egypt.
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20
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Wang K, Chen S, Zhang H, Xu S, Ye F, Zhang Y, Wang J. Pd(0)-catalyzed cross-coupling of allyl halides with α-diazocarbonyl compounds or N-mesylhydrazones: synthesis of 1,3-diene compounds. Org Biomol Chem 2016; 14:3809-20. [DOI: 10.1039/c6ob00454g] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
An efficient method for the synthesis of 1,3-butadiene derivatives based on Pd-catalyzed cross-coupling with allyl bromides or chlorides with α-diazocarbonyl compounds or N-mesylhydrazones is presented.
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Affiliation(s)
- Kang Wang
- Beijing National Laboratory of Molecular Sciences (BNLMS)
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry
- Peking University
- Beijing 100871
| | - Shufeng Chen
- Beijing National Laboratory of Molecular Sciences (BNLMS)
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry
- Peking University
- Beijing 100871
| | - Hang Zhang
- Beijing National Laboratory of Molecular Sciences (BNLMS)
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry
- Peking University
- Beijing 100871
| | - Shuai Xu
- Beijing National Laboratory of Molecular Sciences (BNLMS)
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry
- Peking University
- Beijing 100871
| | - Fei Ye
- Beijing National Laboratory of Molecular Sciences (BNLMS)
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry
- Peking University
- Beijing 100871
| | - Yan Zhang
- Beijing National Laboratory of Molecular Sciences (BNLMS)
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry
- Peking University
- Beijing 100871
| | - Jianbo Wang
- Beijing National Laboratory of Molecular Sciences (BNLMS)
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry
- Peking University
- Beijing 100871
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21
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Allen SK, Lathrop TE, Patel SB, Harrell Moody DM, Sommer RD, Coombs TC. Synthesis of 7-norbornenols via Diels–Alder cycloadditions of cyclopentadienol generated by decomposition of ferrocenium cation. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.09.051] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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22
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Abstract
Diels–Alder (D–A) reaction is undoubtedly the most powerful [4 + 2] cycloaddition reaction in organic synthesis.
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23
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Kotha S, Dipak MK. Design and synthesis of novel bis-annulated caged polycycles via ring-closing metathesis: pushpakenediol. Beilstein J Org Chem 2014; 10:2664-70. [PMID: 25550729 PMCID: PMC4273234 DOI: 10.3762/bjoc.10.280] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Accepted: 10/31/2014] [Indexed: 11/24/2022] Open
Abstract
Intricate caged molecular frameworks are assembled by an atom economical process via a Diels-Alder (DA) reaction, a Claisen rearrangement, a ring-closing metathesis (RCM) and an alkenyl Grignard addition. The introduction of olefinic moieties in the pentacycloundecane (PCUD) framework at appropriate positions followed by RCM led to the formation of novel heptacyclic cage systems.
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Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, India, Fax: 022-2572 7152
| | - Mirtunjay Kumar Dipak
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, India, Fax: 022-2572 7152
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24
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Garai S, Mehta G. Total synthesis of bioactive drimane–epoxyquinol hybrid natural products: macrophorin A, 4′-oxomacrophorin A, and 1′-epi-craterellin A. Tetrahedron Lett 2014; 55:6252-6. [DOI: 10.1016/j.tetlet.2014.09.075] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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25
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Abstract
Recently, important efforts have been devoted to asymmetric Diels-Alder (DA) cycloadditions. Several chiral auxiliaries and catalysts were tested, originating a multitude of selectivities. Here, we study the ability of the isoimidium group as a dienophile activator in DA reactions, as well as its behavior in the induction of selectivity, when incorporated in chiral auxiliary units. We study dienophiles attached to isoimidium auxiliaries derived from (2R,5R)-2,5-diphenylpyrrolidine and from (R)-bis((R)-1-phenylethyl)amine, and show that they lead to low activation energies in DA additions to different dienes. Reported experimental regio- and endo/exo selectitivites are also fully rationalized. While diastereoselectivities originated by (2R,5R)-2,5-diphenylpyrrolidine based dienophiles can easily be rationalized by a C2 symmetric transition state, several transition states have to be simultaneously accounted for the rationalization of the selectivity obtained with dienophiles based on (R)-bis((R)-1-phenylethyl)amine. In this case, the C2 symmetric structure leads to opposite selectivities to those experimentally observed. Thus, while the structures of the dienophiles derived from these two amines seem similar, their behavior in the induction of stereoselectivity in DA reactions is quite different. Our models, which substantially differ from those previously proposed in the literature, can also be adapted to other reactions in which this type of chiral auxiliaries is used.
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Affiliation(s)
- Snezhana M Bakalova
- REQUIMTE, CQFB, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova Lisboa , 2829-516 Caparica, Portugal
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26
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Sen A, Ganguly B. Probing the role of solvation in predicting the π-facial selectivity of 5-Fluoro-2-methyleneadamantane with per-acid: A case study. COMPUT THEOR CHEM 2013. [DOI: 10.1016/j.comptc.2013.10.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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27
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Bakalova SM, Santos AG. Can Diels-Alder Reactions Lead to trans-Fused Products? A Computational Study of the Competitive [4+2] and [2+4] Cycloaddition of Dienes to α-Aryl-Substituted Cyclohexenones. European J Org Chem 2013. [DOI: 10.1002/ejoc.201201754] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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28
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Cahill KJ, Johnson RP. Beyond Frontier Molecular Orbital Theory: A Systematic Electron Transfer Model (ETM) for Polar Bimolecular Organic Reactions. J Org Chem 2012; 78:1864-73. [DOI: 10.1021/jo301731v] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Katharine J. Cahill
- Department of Chemistry, University of New Hampshire, Durham, New Hampshire 03824, United States
| | - Richard P. Johnson
- Department of Chemistry, University of New Hampshire, Durham, New Hampshire 03824, United States
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30
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Mehta G, Sunil Kumar Y, Das M. A de novo Diels–Alder strategy toward the novel pentacyclic natural product fluostatin C: a concise synthesis of 6-deoxyfluostatin C. Tetrahedron Lett 2011; 52:3505-8. [DOI: 10.1016/j.tetlet.2011.04.113] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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31
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Affiliation(s)
- Simon Kim
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Marco A. Ciufolini
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
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32
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Sen A, Mehta G, Ganguly B. A computational approach towards predicting π-facial selectivity in sterically unbiased olefins: an evaluation of the relative importance of electrostatic and orbital effects. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.02.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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33
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Mehta G, Maity P. Towards the total synthesis of tashironin related allo-cedrane natural products: further exploitation of the oxidative dearomatization-IMDA-RCM triad based strategy. Tetrahedron Lett 2011; 52:1753-6. [DOI: 10.1016/j.tetlet.2011.01.109] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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34
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Abstract
Facial selections are reviewed to propose a new theory, orbital phase environment, for stereoselectivities of organic reactions. The orbital phase environment is a generalized idea of the secondary orbital interaction between the non-reacting centers and the unsymmetrization of the orbitals at the reacting centers arising from in-phase and out-of-phase overlapping with those at the neighboring non-reacting sites. In this context, the nucleophilic addition preferentially occurs on the face of the carbonyl functionality opposite to the better electron-donating orbital at the β position. In a similar manner to the carbonyl cases, the preferred reaction faces of olefins in electrophilic addition reactions are opposite to the better electron-donating orbitals at the β positions. The orbital phase environments in Diels-Alder reactions are also reviewed.
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Affiliation(s)
- Tomohiko Ohwada
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113, Japan,
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35
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Affiliation(s)
- Satoshi Inagaki
- Department of Chemistry, Faculty of Engineering, Gifu University, Yanagido, Gifu, 501-1193, Japan,
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36
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Valiulin RA, Arisco TM, Kutateladze AG. Double-tandem [4π+2π]·[2π+2π]·[4π+2π]·[2π+2π] synthetic sequence with photoprotolytic oxametathesis and photoepoxidation in the chromone series. J Org Chem 2011; 76:1319-32. [PMID: 21268619 DOI: 10.1021/jo102221q] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Chromones are introduced into a double-tandem [4(π)+2(π)]·[2(π)+2(π)]·[4(π)+2(π)]·[2(π)+2(π)] synthetic sequence, culminating in photoprotolytic oxametathesis, which leads to an expeditious growth of molecular complexity over a few experimentally simple steps. The overall reaction can potentially be utilized in diversity-oriented synthesis, as it allows for three or more diversity inputs furnishing novel unique polycyclic scaffolds decorated with a variety of functionalities and aromatic/heterocyclic pendants. The polycyclic alkenes, resulting from the oxametathesis step, were found to undergo efficient and clean photoinduced epoxidation when irradiated in the presence of molecular oxygen.
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Affiliation(s)
- Roman A Valiulin
- Department of Chemistry and Biochemistry, University of Denver, Denver, Colorado 80208, USA
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37
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Agopcan S, Çelebi-Ölçüm N, Üçışık MN, Sanyal A, Aviyente V. Origins of the diastereoselectivity in hydrogen bonding directed Diels–Alder reactions of chiral dienes with achiral dienophiles: a computational study. Org Biomol Chem 2011; 9:8079-88. [DOI: 10.1039/c1ob06285a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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38
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39
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Mehta G, Khan TB, Sunil Kumar Y. Total synthesis of the fungal metabolite (±)-acremine G: acceleration of a biomimetic Diels–Alder reaction on silica gel. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.07.109] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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40
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Boag NM, Rao KM. Activation of metal-bound η5-C5Me5 groups to Diels–Alder addition of 3O2 and other dienophiles. Chem Commun (Camb) 2009:1499-501. [DOI: 10.1039/b818537a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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41
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Affiliation(s)
- Arif Baran
- Department of Chemistry, Middle East Technical University, 06531 Ankara, Turkey, and Department of Chemistry, Sakarya University, 54100 Sakarya, Turkey
| | - Metin Balci
- Department of Chemistry, Middle East Technical University, 06531 Ankara, Turkey, and Department of Chemistry, Sakarya University, 54100 Sakarya, Turkey
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42
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Bhargava G, Anand A, Mahajan MP, Saito T, Sakai K, Medhi C. Regio- and π-facial selective Lewis acid interceded Diels–Alder reactions of α-dienyl-β-lactams: an indepth analysis. Tetrahedron 2008; 64:6801-8. [DOI: 10.1016/j.tet.2008.04.087] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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43
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Affiliation(s)
- Arif Baran
- Departments of Chemistry, Middle East Technical University, 06531 Ankara, Turkey, Sakarya University, 54100 Sakarya, Turkey, and Sinop University, 57000, Sinop, Turkey
| | - Aslihan Günel
- Departments of Chemistry, Middle East Technical University, 06531 Ankara, Turkey, Sakarya University, 54100 Sakarya, Turkey, and Sinop University, 57000, Sinop, Turkey
| | - Metin Balci
- Departments of Chemistry, Middle East Technical University, 06531 Ankara, Turkey, Sakarya University, 54100 Sakarya, Turkey, and Sinop University, 57000, Sinop, Turkey
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44
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Chrobok A, Gössinger E, Kalb R, Orglmeister E, Schwaiger J. Towards EPC-syntheses of the structural class of cochleamycins and macquarimicins. Part 2: EPC-synthesis of the hydrindene subunit of the macquarimicins. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.05.094] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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45
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Abstract
Novel hexacyclic caged compounds are prepared by a combination of Claisen rearrangement and ring-closing metathesis (RCM). Additionally, a Grignard reaction in conjugation with RCM produced intricate hexacyclic caged molecules.
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46
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Fu A, Thiel W. Density functional study of noncovalent catalysis of the Diels–Alder reaction by the neutral hydrogen bond donors thiourea and urea. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.theochem.2006.02.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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47
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Abstract
B3LYP/6-311+G** (and MP2/6-311+G**) computations, performed for a series of Diels-Alder (DA) reactions, confirm that the endo transition states (TS) and the related Cope-TSs are favored energetically over the respective exo-TSs. Likewise, the computed magnetic properties (nucleus-independent chemical shifts and magnetic susceptibililties) of the endo- (as well as the Cope) TS's reveal their greater electron delocalization and greater aromaticity than the exo-TS's. However, Woodward and Hoffmann's original example is an exception: their endo-TS model, involving the DA reaction of a syn- with an anti-butadiene (BD), actually is disfavored energetically over the corresponding exo-TS; magnetic criteria also do not indicate the existence of SOI delocalization in either case. Instead, a strong energetic preference for endo-TSs due to SOI is found when both BDs are in the syn conformations. This is in accord with Alder and Stein's rule of "maximum accumulation of double bonds:" both the dienophile and the diene should have syn conformations. Plots along the IRC's show that the magnetic properties typically are most strongly exalted close to the energetic TS. Because of SOI, all the points along the endo reaction coordinates are more diatropic than along the corresponding exo pathways. We find weak SOI effects to be operative in the endo-TSs involved in the cycloadditions of cyclic alkenes, cyclopropene, aziridine, cyclobutene, and cyclopentene, with cyclopentadiene. While the endo-TSs are only slightly lower in energy than the respective exo-TSs, the magnetic properties of the endo-TS's are significantly exalted over those for the exo-TS's and the Natural Bond Orbitals indicate small stabilizing interactions between the methylene cycloalkene hydrogen orbitals (and lone pairs in case of aziridine) with pi-character and the diene pi MOs.
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Affiliation(s)
- Chaitanya S Wannere
- The Center for Computational Chemistry and The Department of Chemistry, University of Georgia, Athens, Georgia 30602-2525, USA
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48
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Morrison CF, Vaters JP, Miller DO, Burnell DJ. Facial selectivity in the 4 + 2 reactions of a diene derived from carvone. Org Biomol Chem 2006. [DOI: 10.1039/b516675f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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49
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Lahiri S, Yadav S, Chanda M, Chakraborty I, Chowdhury K, Mukherjee M, Choudhury AR, Guru Row TN. Importance of steric factors in face-selective cycloadditions: 1,6-annulated cyclohexa-1,3-dienes. Tetrahedron Lett 2005; 46:8133-6. [DOI: 10.1016/j.tetlet.2005.09.129] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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50
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Bhargava G, Mahajan MP, Saito T, Otani T, Kurashima M, Sakai K. Highly Diasteroselective and Remarkably π-Facially Selective Lewis Acid-Catalysed Diels-Alder Cycloaddition Reactions: Access to Novel 1,3,4-Trisubstituted 2-Azetidinones. European J Org Chem 2005. [DOI: 10.1002/ejoc.200500013] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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