1
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Verma RS, Khatana AK, Verma D, Tiwari B. Organocatalytic access to 3-pyridylphosphonates from vinyl phosphonates and aldehydes. Chem Commun (Camb) 2024; 60:5306-5309. [PMID: 38666411 DOI: 10.1039/d4cc00131a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/15/2024]
Abstract
The preparation of 3-phosphorylated pyridines has remained the most challenging compared to the corresponding 2- or 4-functionalized pyridines. Herein, an unprecedented amino-organocatalyzed direct synthesis of 3-pyridylphosphonates from vinylphosphonates and aldehydes has been achieved. This allows access to a wide range of multi-substituted phosphorylated pyridines in excellent yields under transition metal-free conditions.
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Affiliation(s)
- Ram Subhawan Verma
- Department of Biological and Synthetic Chemistry, Centre of Biomedical Research, SGPGIMS-Campus, Raebareli Road, Lucknow, 226014, India.
| | - Anil Kumar Khatana
- Department of Chemistry, R.P.S. Degree College, Balana, Mahendergarh, 123029, Haryana, India
| | - Deepika Verma
- Department of Biological and Synthetic Chemistry, Centre of Biomedical Research, SGPGIMS-Campus, Raebareli Road, Lucknow, 226014, India.
| | - Bhoopendra Tiwari
- Department of Biological and Synthetic Chemistry, Centre of Biomedical Research, SGPGIMS-Campus, Raebareli Road, Lucknow, 226014, India.
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2
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Voronin VV, Polynski MV, Ledovskaya MS. 1,2,4-Triazines and Calcium Carbide in the Catalyst-Free Synthesis of 2,3,6-Trisubstituted Pyridines and Their D-, 13 C-, and Doubly D 2 - 13 C 2 -Labeled Analogues. Chem Asian J 2023; 18:e202300781. [PMID: 37843978 DOI: 10.1002/asia.202300781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 10/12/2023] [Accepted: 10/16/2023] [Indexed: 10/18/2023]
Abstract
A novel synthetic approach to 2,3,6-trisubstituted pyridines, their 4,5-dideuterated derivatives, 4,5-13 C2 - and doubly-labeled D2 -13 C2 -pyridines has been developed using catalyst-free [4+2] cycloaddition of 1,2,4-triazines and in situ generated acetylene or labeled acetylene. Calcium carbide and water or deuterium oxide were used for the in situ generation of acetylene and dideuteroacetylene. Calcium carbide-13 C2 in the mixture with water or deuterium oxide was applied as 13 C2 -acetylene and D2 -13 C2 -acetylene source.
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Affiliation(s)
- Vladimir V Voronin
- Saint Petersburg State University, Institute of Chemistry, Universitetsky Prospect 26, Saint Petersburg, 198504, Russia
| | - Mikhail V Polynski
- Saint Petersburg State University, Institute of Chemistry, Universitetsky Prospect 26, Saint Petersburg, 198504, Russia
- Current address: National University of Singapore, Department of Chemical and Biomolecular Engineering, 4 Engineering Drive 4, Singapore, 117585, Singapore
| | - Maria S Ledovskaya
- Saint Petersburg State University, Institute of Chemistry, Universitetsky Prospect 26, Saint Petersburg, 198504, Russia
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3
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Li J, Gu A, Nong XM, Zhai S, Yue ZY, Li MY, Liu Y. Six-Membered Aromatic Nitrogen Heterocyclic Anti-Tumor Agents: Synthesis and Applications. CHEM REC 2023; 23:e202300293. [PMID: 38010365 DOI: 10.1002/tcr.202300293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 10/19/2023] [Indexed: 11/29/2023]
Abstract
Cancer stands as a serious malady, posing substantial risks to human well-being and survival. This underscores the paramount necessity to explore and investigate novel antitumor medications. Nitrogen-containing compounds, especially those derived from natural sources, form a highly significant category of antitumor agents. Among these, antitumor agents with six-membered aromatic nitrogen heterocycles have consistently attracted the attention of chemists and pharmacologists. Accordingly, we present a comprehensive summary of synthetic strategies and clinical implications of these compounds in this review. This entails an in-depth analysis of synthesis pathways for pyridine, quinoline, pyrimidine, and quinazoline. Additionally, we explore the historical progression, targets, mechanisms of action, and clinical effectiveness of small molecule inhibitors possessing these structural features.
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Affiliation(s)
- Jiatong Li
- State Key Laboratory of Systems Medicine for Cancer, Shanghai Cancer Institute, Department of Biliary-Pancreatic Surgery, Renji Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 160 Pujian Road, Shanghai, 200127, China
| | - Ao Gu
- State Key Laboratory of Systems Medicine for Cancer, Shanghai Cancer Institute, Department of Biliary-Pancreatic Surgery, Renji Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 160 Pujian Road, Shanghai, 200127, China
| | - Xiao-Mei Nong
- State Key Laboratory of Systems Medicine for Cancer, Shanghai Cancer Institute, Department of Biliary-Pancreatic Surgery, Renji Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 160 Pujian Road, Shanghai, 200127, China
| | - Shuyang Zhai
- State Key Laboratory of Systems Medicine for Cancer, Shanghai Cancer Institute, Department of Biliary-Pancreatic Surgery, Renji Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 160 Pujian Road, Shanghai, 200127, China
| | - Zhu-Ying Yue
- State Key Laboratory of Systems Medicine for Cancer, Shanghai Cancer Institute, Department of Biliary-Pancreatic Surgery, Renji Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 160 Pujian Road, Shanghai, 200127, China
| | - Meng-Yao Li
- State Key Laboratory of Systems Medicine for Cancer, Shanghai Cancer Institute, Department of Biliary-Pancreatic Surgery, Renji Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 160 Pujian Road, Shanghai, 200127, China
| | - Yingbin Liu
- State Key Laboratory of Systems Medicine for Cancer, Shanghai Cancer Institute, Department of Biliary-Pancreatic Surgery, Renji Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 160 Pujian Road, Shanghai, 200127, China
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4
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Azad SA, Bera A, Samanta J, Sepay N, Jana R, Pal CK, Molla MR, Maiti D, Samanta S. Urea-Promoted Neat Synthesis of Fused Dihydroisoquinolines and Disubstituted Pyridines: A Mechanistic Observation with Molecular-Sensing Studies. Chemistry 2023:e202303287. [PMID: 37997510 DOI: 10.1002/chem.202303287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Revised: 11/14/2023] [Accepted: 11/21/2023] [Indexed: 11/25/2023]
Abstract
An efficient and short synthesis of fused dihydroisoquinolines, diaryl substituted pyridine derivatives in good to high yields has been established by using an environmentally safe, solvent-metal-oxidant-free tandem approach. In this article, we discuss how the electrocyclic reaction is more pronounced in the solid phase in the presence of urea, whereas the typical aza-Michael addition is more prominent in presence of arylamine in the solution phase for 3-(2-formylcycloalkenyl)acrylic ester derivative substrates. The wide range of substrates and urea-promoted neat synthesis made our approach more significant in medical and also analytical science. Moreover, an isoquinoline alkaloid decumbenine B analogue has been synthesized by using our newly developed neat methodology. We have also investigated the photophysical properties of the synthesized fused dihydroisoquinoline derivatives. One of the synthesized molecules was used as a sensor for the selective detection of toxic picric acid. Therefore, the effective neat synthesis and molecular sensing applications of these compounds made our approach more exciting in the field of heterocyclic chemistry.
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Affiliation(s)
- Sk Abulkalam Azad
- Department of Chemistry, Bidhannagar College, Salt Lake, Sector - I, Kolkata, 700064, India
- Department of Chemistry, University of Calcutta, Acharya Prafulla Chandra Road, Kolkata, 700009, India
| | - Anirban Bera
- Department of Chemistry, Bidhannagar College, Salt Lake, Sector - I, Kolkata, 700064, India
| | - Jayanta Samanta
- Department of Chemistry, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, 603203, India
| | - Nayim Sepay
- Department of Chemistry, Lady Brabourne College, Kolkata, 700 017, India
| | - Rathin Jana
- Department of Chemistry, Shahid Matangini Hazra Govt. General Degree College for Women, West Bengal, India
| | - Chandan Kumar Pal
- Department of Chemistry, Bidhannagar College, Salt Lake, Sector - I, Kolkata, 700064, India
| | - Mijanur Rahaman Molla
- Department of Chemistry, University of Calcutta, Acharya Prafulla Chandra Road, Kolkata, 700009, India
| | - Debabrata Maiti
- Department of Chemistry, Indian Institute of Technology Bombay Powai, Mumbai, Maharashtra, 400076, India
| | - Shubhankar Samanta
- Department of Chemistry, Bidhannagar College, Salt Lake, Sector - I, Kolkata, 700064, India
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5
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Kheirkhah B, Huadsai W, Liebing P, Bontemps S, Westerhausen M. Group IV Complexes with Sterically Congested N-Aryl-adamantylcarbamidate Ligands. Organometallics 2023; 42:2304-2311. [PMID: 37654652 PMCID: PMC10467577 DOI: 10.1021/acs.organomet.3c00291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Indexed: 09/02/2023]
Abstract
Metalation of N-(2,6-dibenzhydryl-4-tolyl)adamantane-1-carboxamide (1, Ar*N(H)-C(O)-Ad) with M(NMe2)4 (M = Ti, Zr, Hf) yields amidate complexes Ar*N=C(Ad)-O-Ti(NMe2)3 (2) as well as bis(amidate) compounds (Ar*N=C(Ad)-O)2M(NMe2)2 (M = Zr (3), Hf (4)). In 2, the amidate ligand acts as a monodentate base via the oxygen atom with the Ti center in a slightly distorted tetrahedral environment. The steric requirement of the amidate ligand stabilizes the small coordination number of four of the Ti atom. In congeners 3 and 4, two bidentate amidate ligands exist in the coordination spheres, leading to hexacoordinate group IV metal atoms. The small bite angles of the Zr- and Hf-bound amidate ligands lead to severe distortion of the octahedral environments of the Zr and Hf centers. Titanium compound 2 is an unsuitable choice to catalyze hydrofunctionalization of alkynes with amines and phosphane oxides and despite the significantly smaller pKa value of the carboxylic amide, formation of carboxamide 1 is the dominant reaction upon addition of amines or phosphane oxides to release intramolecular steric strain introduced by the very bulky adamantylamidato ligand.
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Affiliation(s)
- Bahareh
Rezaei Kheirkhah
- Institute
of Inorganic and Analytical Chemistry, Friedrich
Schiller University Jena (FSU), Humboldtstraße 8, D-07743 Jena, Germany
| | - Wimonsiri Huadsai
- Institute
of Inorganic and Analytical Chemistry, Friedrich
Schiller University Jena (FSU), Humboldtstraße 8, D-07743 Jena, Germany
- CNRS
Laboratoire de Chimie de Coordination, UPR 8241, 205 Route de Narbonne, Toulouse CEDEX 4 31077, France
| | - Phil Liebing
- Institute
of Inorganic and Analytical Chemistry, Friedrich
Schiller University Jena (FSU), Humboldtstraße 8, D-07743 Jena, Germany
| | - Sébastien Bontemps
- CNRS
Laboratoire de Chimie de Coordination, UPR 8241, 205 Route de Narbonne, Toulouse CEDEX 4 31077, France
| | - Matthias Westerhausen
- Institute
of Inorganic and Analytical Chemistry, Friedrich
Schiller University Jena (FSU), Humboldtstraße 8, D-07743 Jena, Germany
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6
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Escorihuela J, Lledós A, Ujaque G. Anti-Markovnikov Intermolecular Hydroamination of Alkenes and Alkynes: A Mechanistic View. Chem Rev 2023; 123:9139-9203. [PMID: 37406078 PMCID: PMC10416226 DOI: 10.1021/acs.chemrev.2c00482] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Indexed: 07/07/2023]
Abstract
Hydroamination, the addition of an N-H bond across a C-C multiple bond, is a reaction with a great synthetic potential. Important advances have been made in the last decades concerning catalysis of these reactions. However, controlling the regioselectivity in the amine addition toward the formation of anti-Markovnikov products (addition to the less substituted carbon) still remains a challenge, particularly in intermolecular hydroaminations of alkenes and alkynes. The goal of this review is to collect the systems in which intermolecular hydroamination of terminal alkynes and alkenes with anti-Markovnikov regioselectivity has been achieved. The focus will be placed on the mechanistic aspects of such reactions, to discern the step at which regioselectivity is decided and to unravel the factors that favor the anti-Markovnikov regioselectivity. In addition to the processes entailing direct addition of the amine to the C-C multiple bond, alternative pathways, involving several reactions to accomplish anti-Markovnikov regioselectivity (formal hydroamination processes), will also be discussed in this review. The catalysts gathered embrace most of the metal groups of the Periodic Table. Finally, a section discussing radical-mediated and metal-free approaches, as well as heterogeneous catalyzed processes, is also included.
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Affiliation(s)
- Jorge Escorihuela
- Departament
de Química Orgànica, Universitat
de València, 46100 Burjassot, Valencia, Spain
| | - Agustí Lledós
- Departament
de Química and Centro de Innovación en Química
Avanzada (ORFEO-CINQA), Universitat Autònoma
de Barcelona, 08193 Cerdanyola del Vallès, Barcelona, Catalonia, Spain
| | - Gregori Ujaque
- Departament
de Química and Centro de Innovación en Química
Avanzada (ORFEO-CINQA), Universitat Autònoma
de Barcelona, 08193 Cerdanyola del Vallès, Barcelona, Catalonia, Spain
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7
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Verma V, Schafer LL. One-Pot Sequential Hydroamination Protocol for N-Heterocycle Synthesis: One Method To Access Five Different Classes of Tri-Substituted Pyridines. J Org Chem 2023; 88:1378-1384. [PMID: 36634317 DOI: 10.1021/acs.joc.2c02155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Tri-substituted pyridines are important scaffolds that can be found in a plethora of commercially available drugs. A one-pot general method for the selective synthesis of less explored/challenging patterns of tri-substituted pyridines is described. Hydroamination of alkynes with commercially available N-triphenylsilylamine generates N-silylenamines. These in situ generated N-silylenamines, upon reaction with α,β-unsaturated carbonyl compounds and subsequent oxidation, furnish 25 examples of selectively substituted 2,4,5-, 2,3,4-, 3,4,5-, 2,3,5-, and 2,3,6-trisubstituted pyridines in up to 78% yield. The reaction features high functional group compatibility providing an expeditious and general approach for the assembly of selectively substituted tri-substituted pyridine derivatives. The robustness and practicality of the reaction have been demonstrated in a gram-scale reaction.
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Affiliation(s)
- Vani Verma
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British ColumbiaV6T 1Z1, Canada
| | - Laurel L Schafer
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British ColumbiaV6T 1Z1, Canada
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8
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Wun BJ, Hu YC, Chi CY, Chuang GJ. Photoinduced Decarbonylative Rearrangement of Diazabicyclo[2.2.2]Octenones: A Photochemical Approach of Diazabicyclo[4.1.0]heptene Skeleton from Masked o-Benzoquinone. J Org Chem 2023; 88:1235-1244. [PMID: 36606370 DOI: 10.1021/acs.joc.2c02373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
We report a photoinduced decarbonylative rearrangement of diazabicyclo[2.2.2]octenone in the facile synthesis of a functionalized diazabicyclo[4.1.0]heptene skeleton, a unique derivative of the hydropyridazine type structure which could be found in a variety of biologically active natural products. The scope of functional group compatibility in the photoreaction was examined by taking advantage of the easy access of the heterobicyclo[2.2.2] structure from the Diels-Alder reaction of masked o-benzoquinones. 4-Phenyl-1,2,4-triazoline-3,5-dione served as the dienophile which provided the adjacent N-N unit in hexahydropyridazine-type products of subsequent photorearrangement.
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Affiliation(s)
- Bo-Jyun Wun
- Department of Chemistry, Chung Yuan Christian University, Chung-Li 320314, Taiwan
| | - Yung-Chen Hu
- Department of Chemistry, Chung Yuan Christian University, Chung-Li 320314, Taiwan
| | - Chu-Yun Chi
- Department of Chemistry, Chung Yuan Christian University, Chung-Li 320314, Taiwan
| | - Gary Jing Chuang
- Department of Chemistry, Chung Yuan Christian University, Chung-Li 320314, Taiwan
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9
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Griffin SE, Adamczyk OV, Schafer LL. Vanadium pyridonates: dimerization, redox behaviour, and metal-ligand cooperativity. Dalton Trans 2022; 51:14654-14663. [PMID: 36093858 DOI: 10.1039/d2dt02177c] [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
The synthesis, structure, and reactivity of vanadium pyridonate complexes are described. Vanadium(III) pyridonate complexes were accessed through protonolysis and reduction of a tetrakis(amido)vanadium(IV) starting material. Bis(pyridonate) vanadium(IV) precursors could be isolated depending on the amount of proteoligand added. The targeted vanadium(III) species tend to form dimers, but monomeric complexes can be achieved in the presence of neutral donors such as amines or pyridine derivatives or through the use of sterically demanding proligands. The reduction process is proposed to involve dimeric intermediates and be mediated by the amine released from protonolysis, thereby forming the corresponding imine as a byproduct. Isolated amine complexes of vanadium(III) are presented. In contrast, bis(amidate)vanadium(IV) complexes were not found to undergo a similar reduction. This work informs on design principles for the synthesis and application of new vanadium pyridonate catalysts for transformations involving dimerization and PCET for changes in oxidation state.
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Affiliation(s)
- Samuel E Griffin
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, Canada, V6T 1Z1.
| | - Olivia V Adamczyk
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, Canada, V6T 1Z1.
| | - Laurel L Schafer
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, Canada, V6T 1Z1.
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10
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Nandi S, Jamatia R, Sarkar R, Sarkar FK, Alam S, Pal AK. One‐Pot Multicomponent Reaction: A Highly Versatile Strategy for the Construction of Valuable Nitrogen‐Containing Heterocycles. ChemistrySelect 2022. [DOI: 10.1002/slct.202201901] [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)
- Sibaji Nandi
- Department of Chemistry North-Eastern Hill University Shillong Meghalaya 793022 India
| | - Ramen Jamatia
- Department of Chemistry Rajiv Gandhi University, Rono Hills, Doimukh Arunachal Pradesh 791112 India
| | - Rajib Sarkar
- Department of Chemistry North-Eastern Hill University Shillong Meghalaya 793022 India
| | - Fillip Kumar Sarkar
- Department of Chemistry North-Eastern Hill University Shillong Meghalaya 793022 India
| | - Safiul Alam
- Department of Chemistry Aliah University, IIA/27, New Town Kolkata 700160 India
| | - Amarta Kumar Pal
- Department of Chemistry North-Eastern Hill University Shillong Meghalaya 793022 India
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11
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Patel AK, Rathor SS, Samanta S. Regioselective access to di- and trisubstituted pyridines via a metal-oxidant-solvent-free domino reaction involving 3-chloropropiophenones. Org Biomol Chem 2022; 20:6759-6765. [PMID: 35972042 DOI: 10.1039/d2ob01193j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A remarkable metal-oxidant-solvent- and base-free domino route for regioselective access to a wide range of 2,4-di- and 2,3,4/6-trisubstituted pyridines including carbo- and heterocyclic fused pyridines is reported. This [3C + 2C + 1N] cyclization reaction occurs between 3-chloropropiophenones (3C units), enolizable acyclic/cyclic ketones (2C sources) and NH4OAc as a robust N source under neat conditions under an open atmosphere, producing new C=C and C=N-C bonds in highly chemo- and regioselective manners. Interestingly, this eco-friendly method has many positive features: excellent functional group tolerance, broad substrate scope, good to excellent regioselectivities, promising yields, no-unwanted products, neutral reaction conditions and appropriateness for large-scale synthesis. Mechanism studies reveal that the in situ generated β-amino ketone from 3-chloropropiophenone and an ammonium salt undergoes C=N bond formation with a ketone followed by an intramolecular cyclization process (C=C bond), which are the decisive steps for pyridine synthesis.
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Affiliation(s)
- Ashvani Kumar Patel
- Department of Chemistry, Indian Institute of Technology Indore, Simrol, 453552, India.
| | - Shikha Singh Rathor
- Department of Chemistry, Indian Institute of Technology Indore, Simrol, 453552, India.
| | - Sampak Samanta
- Department of Chemistry, Indian Institute of Technology Indore, Simrol, 453552, India.
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12
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Xie Y, Huang L, Feng H, Qi Y, Van der Eycken EV, Feng H. Regio- and Chemoselective Copper-Catalyzed Formal [2+2+2] Cycloaddition of Primary Amines with Arylacetylenes to 2,4,5-Trisubstituted Pyridines. Org Lett 2022; 24:6346-6350. [PMID: 36005451 DOI: 10.1021/acs.orglett.2c02606] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Disclosed herein is an efficient strategy for the synthesis of 2,4,5-trisubstituted pyridines via CuI/NBS-catalyzed formal intermolecular [2+2+2] cycloaddition of easily available primary amines and nonactivated terminal alkynes. Moreover, this given reaction features a new mode of cycloaddition with high regio- and chemoselectivity, good atom- and step-economy, broad substrate scope, and wide functional group compatibility. Further mechanism studies indicate that this transformation starts with oxidative alkynylation of the amine to form a propargylamine intermediate, followed by radical addition to the alkyne and intramolecular cycloaddition, delivering the pharmacologically interesting multisubstituted pyridines.
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Affiliation(s)
- Yujuan Xie
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China
| | - Liliang Huang
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China
| | - Huihui Feng
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China
| | - Yayu Qi
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China
| | - Erik V Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven, B-3001, Belgium.,Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya Street 6, Moscow, 117198, Russia
| | - Huangdi Feng
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China
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13
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Verma V, Koperniku A, Edwards PM, Schafer LL. N-Silylamines in catalysis: synthesis and reactivity. Chem Commun (Camb) 2022; 58:9174-9189. [PMID: 35929426 DOI: 10.1039/d2cc02915d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A summary of the catalytic synthesis and reactivity of N-silylated amines is presented. Dehydrocoupling of amines with silanes, hydrosilylation of imines and dealkenylative coupling of amines with vinylsilanes are three ways to achieve their catalytic syntheses. The resultant N-silylamines serve as substrates in a variety of reactions, including C-N and C-C bond forming reactions, and are preferred in transformations because of the facile Si-N hydrolytic cleavage to reveal free amine products upon reaction completion. This review highlights the distinct electronic properties of N-silyl amines, N-silyl imines and N-silyl enamines that result in complementary reactivity to that of parent non-silyl variants.
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Affiliation(s)
- Vani Verma
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada.
| | - Ana Koperniku
- Faculty of Pharmaceutical Sciences, The University of British Columbia, 2405 Wesbrook Mall, Vancouver, BC V6T 1Z3, Canada
| | - Peter M Edwards
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada.
| | - Laurel L Schafer
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada.
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14
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He Q, Cao L, Wei Y, Dake GR. Utility of 2‐Diphenylphosphoryloxy‐1,3‐Dienes in Multicomponent Hetero‐Diels–Alder Reactions to Construct Functionalized Six‐Membered Nitrogen Heterocycles. Chemistry 2022; 28:e202201328. [DOI: 10.1002/chem.202201328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Indexed: 11/08/2022]
Affiliation(s)
- Qiuyu He
- Department of Chemistry University of British Columbia, Vancouver 2036 Main Mall Vancouver, B.C. V6T 1Z1 Canada
| | - Lirong Cao
- Department of Chemistry University of British Columbia, Vancouver 2036 Main Mall Vancouver, B.C. V6T 1Z1 Canada
| | - Yiran Wei
- Department of Chemistry University of British Columbia, Vancouver 2036 Main Mall Vancouver, B.C. V6T 1Z1 Canada
| | - Gregory R. Dake
- Department of Chemistry University of British Columbia, Vancouver 2036 Main Mall Vancouver, B.C. V6T 1Z1 Canada
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15
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Reza AI, Iwai K, Nishiwaki N. Recent Advances in Synthesis of Multiply Arylated/Alkylated Pyridines. CHEM REC 2022; 22:e202200099. [PMID: 35701177 DOI: 10.1002/tcr.202200099] [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: 04/23/2022] [Revised: 05/28/2022] [Indexed: 11/10/2022]
Abstract
Multiply aryl/alkyl-substituted pyridines are some of the untapped synthetic targets because of the challenge in regioselectively introducing less polar aryl/alkyl groups at the desired positions in the pyridine framework. Interestingly, the importance of this family of compounds has increased annually, particularly in biological and materials engineering applications. The syntheses of such pyridines have been extensively reported, but there is a lack of comprehensive review articles. Hence, this review discusses recent advances by grouping reaction patterns that generally deliver tri-, tetra-, and penta-aryl/alkyl pyridines.
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Affiliation(s)
- Annisa Indah Reza
- School of Environmental Science and Engineering, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502, Japan
| | - Kento Iwai
- School of Environmental Science and Engineering, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502, Japan.,Research Center for Molecular Design, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502, Japan
| | - Nagatoshi Nishiwaki
- School of Environmental Science and Engineering, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502, Japan.,Research Center for Molecular Design, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502, Japan
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16
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Unveiling the complexity of the dual gold(I) catalyzed intermolecular hydroamination of alkynes leading to vinylazoles. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2021.112090] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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17
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Al‐Rifai NM, Mubarak MS. α‐Substituted Chalcones: A Key Review. ChemistrySelect 2021. [DOI: 10.1002/slct.202103325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Nafisah M. Al‐Rifai
- Pharmaceutical and chemical engineering department School of Medical Sciences German-Jordanian University, P.O. Box 35247 Amman 111800 Jordan
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18
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Hao H, Schafer LL. Titanium-Catalyzed Hydroamination of an Organometallic Acetylide to Access Copper Enamides. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Han Hao
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T1Z1
| | - Laurel L. Schafer
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T1Z1
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19
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Mao Y, Mao H, Xu J, Liu T, Liu B, Tan Q, Ding CH, Xu B. Synthesis of Poly-Substituted Pyridines via Noble-Metal-Free Cycloaddition of Ketones and Imines. Chem Asian J 2021; 16:3905-3908. [PMID: 34626095 DOI: 10.1002/asia.202100983] [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: 08/21/2021] [Revised: 10/05/2021] [Indexed: 11/12/2022]
Abstract
An eco-friendly and noble-metal-free formal [4+2] cycloaddition reaction was developed for the efficient synthesis of biologically interesting poly-substituted pyridines from easily available ketones and imines, whereby two sequential C-C bonds are formed. The given approach features a unique synthetic strategy of imines and ketones with wide substrate scope, good functional group tolerance, mild conditions and operational simplicity, which represents a more direct pathway to synthesize poly-substituted pyridines than traditional methods.
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Affiliation(s)
- Yeting Mao
- Department of Chemistry, Affiliated Nantong Hospital of Shanghai University (The Sixth People's Hospital of Nantong), Shanghai Engineering Research Center of Organ Repair, Innovative Drug Research Center, School of Medicine, Shanghai University, Shanghai, 200444, P. R. China
| | - Hong Mao
- Department of Chemistry, Affiliated Nantong Hospital of Shanghai University (The Sixth People's Hospital of Nantong), Shanghai Engineering Research Center of Organ Repair, Innovative Drug Research Center, School of Medicine, Shanghai University, Shanghai, 200444, P. R. China
| | - Jiaojiao Xu
- Department of Chemistry, Affiliated Nantong Hospital of Shanghai University (The Sixth People's Hospital of Nantong), Shanghai Engineering Research Center of Organ Repair, Innovative Drug Research Center, School of Medicine, Shanghai University, Shanghai, 200444, P. R. China
| | - Tianqi Liu
- Department of Chemistry, Affiliated Nantong Hospital of Shanghai University (The Sixth People's Hospital of Nantong), Shanghai Engineering Research Center of Organ Repair, Innovative Drug Research Center, School of Medicine, Shanghai University, Shanghai, 200444, P. R. China
| | - Bingxin Liu
- Department of Chemistry, Affiliated Nantong Hospital of Shanghai University (The Sixth People's Hospital of Nantong), Shanghai Engineering Research Center of Organ Repair, Innovative Drug Research Center, School of Medicine, Shanghai University, Shanghai, 200444, P. R. China
| | - Qitao Tan
- Department of Chemistry, Affiliated Nantong Hospital of Shanghai University (The Sixth People's Hospital of Nantong), Shanghai Engineering Research Center of Organ Repair, Innovative Drug Research Center, School of Medicine, Shanghai University, Shanghai, 200444, P. R. China
| | - Chang-Hua Ding
- Department of Chemistry, Affiliated Nantong Hospital of Shanghai University (The Sixth People's Hospital of Nantong), Shanghai Engineering Research Center of Organ Repair, Innovative Drug Research Center, School of Medicine, Shanghai University, Shanghai, 200444, P. R. China
| | - Bin Xu
- Department of Chemistry, Affiliated Nantong Hospital of Shanghai University (The Sixth People's Hospital of Nantong), Shanghai Engineering Research Center of Organ Repair, Innovative Drug Research Center, School of Medicine, Shanghai University, Shanghai, 200444, P. R. China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, P. R. China
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20
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Clarke JJ, Devaraj K, Bestvater BP, Kojima R, Eisenberger P, DeJesus JF, Crudden CM. Hydrosilylation and Mukaiyama aldol-type reaction of quinolines and hydrosilylation of imines catalyzed by a mesoionic carbene-stabilized borenium ion. Org Biomol Chem 2021; 19:6786-6791. [PMID: 34318834 DOI: 10.1039/d1ob01056e] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Aldimines and ketimines containing electron-donating and electron-withdrawing groups can be hydrosilylated with borenium catalysts at as low as 1 mol% catalyst loading at room temperature, providing the corresponding secondary amines in excellent yields. Reactions with 2-phenylquinoline gave the 1,4-hydrosilylquinoline product selectively which can be further functionalized in a one-pot synthesis to give unique γ-amino alcohol derivatives. Control experiments suggest that the borenium ion catalyzes both the hydrosilylation and subsequent addition to the aldehyde.
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Affiliation(s)
- Joshua J Clarke
- Department of Chemistry, Queen's University, Chernoff Hall, Kingston, Ontario K7L 3N6, Canada.
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21
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Huh DN, Cheng Y, Frye CW, Egger DT, Tonks IA. Multicomponent syntheses of 5- and 6-membered aromatic heterocycles using group 4-8 transition metal catalysts. Chem Sci 2021; 12:9574-9590. [PMID: 34349931 PMCID: PMC8293814 DOI: 10.1039/d1sc03037j] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 06/28/2021] [Indexed: 12/31/2022] Open
Abstract
In this Perspective, we discuss recent syntheses of 5- and 6-membered aromatic heterocycles via multicomponent reactions (MCRs) that are catalyzed by group 4-8 transition metals. These MCRs can be categorized based on the substrate components used to generate the cyclized product, as well as on common mechanistic features between the catalyst systems. These particular groupings are intended to highlight mechanistic and strategic similarities between otherwise disparate transition metals and to encourage future work exploring related systems with otherwise-overlooked elements. Importantly, in many cases these early- to mid-transition metal catalysts have been shown to be as effective for heterocycle syntheses as the later (and more commonly implemented) group 9-11 metals.
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22
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Manßen M, Deng D, Zheng CHM, DiPucchio RC, Chen D, Schafer LL. Ureate Titanium Catalysts for Hydroaminoalkylation: Using Ligand Design to Increase Reactivity and Utility. ACS Catal 2021. [DOI: 10.1021/acscatal.1c00014] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Manfred Manßen
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Danfeng Deng
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Cameron H. M. Zheng
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Rebecca C. DiPucchio
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Dafa Chen
- Shenzhen Grubbs Institute, Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, People’s Republic of China
| | - Laurel L. Schafer
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
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23
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Hao H, Bagnol T, Pucheault M, Schafer LL. Using Catalysts To Make Catalysts: Titanium-Catalyzed Hydroamination To Access P,N-Ligands for Assembling Catalysts in One Pot. Org Lett 2021; 23:1974-1979. [PMID: 33661014 DOI: 10.1021/acs.orglett.0c04212] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Using a diamido-bis(amidate) titanium precatalyst, the hydroamination of alkynylphosphines afforded phosphinoenamine products. After reduction, 2-aminophosphines are prepared in excellent yield and on gram scale. A broad variety of alkynylphosphines and primary amines with different electronic and steric features are tolerated in this sequential transformation, enabling the rapid assembly of a collection of ligands. Additionally, intermediate phosphinoenamines can be used directly as proligands for coordination to transition metals using protonolysis or salt metathesis reactions. These transformations result in easy-to-use one pot protocols to prepare metal P,N-complexes for catalysis or small molecule activation.
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Affiliation(s)
- Han Hao
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC Canada, V6T1Z1
| | - Thibault Bagnol
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC Canada, V6T1Z1.,Institut des Sciences Moléculaires Université de Bordeaux, Institut Européen de Chimie et Biologie 2 Rue Robert Escarpit, 33600 Pessac, France
| | - Mathieu Pucheault
- Institut des Sciences Moléculaires Université de Bordeaux, Institut Européen de Chimie et Biologie 2 Rue Robert Escarpit, 33600 Pessac, France
| | - Laurel L Schafer
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC Canada, V6T1Z1
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24
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Wang Y, Zhao Z, Lv S, Ding L, Wang XN, Chang J. Nonmetal-catalyzed hydroamination of ynamides with amines. Org Chem Front 2021. [DOI: 10.1039/d1qo01052b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A TfOH-catalyzed hydroamination of ynamides with primary and secondary amines under mild reaction conditions is described for the efficient synthesis of N-arylimines and ethene-1,1-diamines.
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Affiliation(s)
- Yanru Wang
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Zhen Zhao
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Songkui Lv
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Lixia Ding
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Xiao-Na Wang
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Junbiao Chang
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, P. R. China
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25
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Rakshit A, Kumar P, Alam T, Dhara H, Patel BK. Visible-Light-Accelerated Pd-Catalyzed Cascade Addition/Cyclization of Arylboronic Acids to γ- and β-Ketodinitriles for the Construction of 3-Cyanopyridines and 3-Cyanopyrrole Analogues. J Org Chem 2020; 85:12482-12504. [DOI: 10.1021/acs.joc.0c01703] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Amitava Rakshit
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Prashant Kumar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Tipu Alam
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Hirendranath Dhara
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Bhisma K. Patel
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
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26
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Hao H, Schafer LL. Metal–Ligand Cooperativity in Titanium-Catalyzed Anti-Markovnikov Hydroamination. ACS Catal 2020. [DOI: 10.1021/acscatal.0c00491] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Han Hao
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, Canada V6T1Z1
| | - Laurel L. Schafer
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, Canada V6T1Z1
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27
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Chang MY, Tsai YL. One-Pot Amberlyst 15-Controlled Cyclocondensation of Piperidines and Arylaldehydes: Synthesis of 3,5-Diarylmethylpyridines. J Org Chem 2020; 85:5651-5659. [PMID: 32208623 DOI: 10.1021/acs.joc.9b03315] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Amberlyst 15-controlled one-pot easy-operational intermolecular cyclocondensation of substituted piperidines with arylaldehydes provides diversified 3,5-diarylmethylpyridines in high to excellent yields under refluxing toluene conditions. The uses of various acidic solid supports and reaction solvents are investigated for facile and efficient transformation. A plausible mechanism has been proposed.
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Affiliation(s)
- Meng-Yang Chang
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan
| | - Yu-Lin Tsai
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 807, Taiwan
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28
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Arita M, Yokoyama S, Asahara H, Nishiwaki N. Three Step Synthesis of Fully and Differently Arylated Pyridines. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901663] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Mao Arita
- School of Environmental Science and Engineering; Kochi University of Technology; Tosayamada 782-8502 Kami Kochi Japan
| | - Soichi Yokoyama
- School of Environmental Science and Engineering; Kochi University of Technology; Tosayamada 782-8502 Kami Kochi Japan
- Research Center for Material Science and Engineering; Kochi University of Technology; Tosayamada 782-8502 Kami Kochi Japan
| | - Haruyasu Asahara
- School of Environmental Science and Engineering; Kochi University of Technology; Tosayamada 782-8502 Kami Kochi Japan
- Research Center for Material Science and Engineering; Kochi University of Technology; Tosayamada 782-8502 Kami Kochi Japan
- Graduate School of Pharmaceutical Sciences; Osaka University; Yamadaoka 1-6, Suita 565-0871 Osaka Japan
| | - Nagatoshi Nishiwaki
- School of Environmental Science and Engineering; Kochi University of Technology; Tosayamada 782-8502 Kami Kochi Japan
- Research Center for Material Science and Engineering; Kochi University of Technology; Tosayamada 782-8502 Kami Kochi Japan
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29
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Ten years of progress in the synthesis of six-membered N-heterocycles from alkynes and nitrogen sources. Tetrahedron 2020. [DOI: 10.1016/j.tet.2019.130876] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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30
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Titanium catalyzed synthesis of amines and N-heterocycles. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2020. [DOI: 10.1016/bs.adomc.2020.04.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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31
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Xie Y, Wu C, Jia C, Tung CH, Wang W. Iron–cobalt-catalyzed heterotrimerization of alkynes and nitriles to polyfunctionalized pyridines. Org Chem Front 2020. [DOI: 10.1039/d0qo00693a] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The iron(ii)–cobalt(ii) co-catalyzed heterotrimerization of alkynes and nitriles enables the synthesis of 2,3,4,5,6-pentafunctionalized pyridines in a single step.
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Affiliation(s)
- Yufang Xie
- Key Lab of Colloid and Interface Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
| | - Chengjuan Wu
- Key Lab of Colloid and Interface Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
| | - Changhao Jia
- Key Lab of Colloid and Interface Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
| | - Chen-Ho Tung
- Key Lab of Colloid and Interface Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
| | - Wenguang Wang
- Key Lab of Colloid and Interface Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
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32
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Manßen M, Schafer LL. Titanium catalysis for the synthesis of fine chemicals – development and trends. Chem Soc Rev 2020; 49:6947-6994. [DOI: 10.1039/d0cs00229a] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Atlas as a Titan(ium) is holding the earth-abundant chemistry world. Titanium is the second most abundant transition metal, is a key player in important industrial processes (e.g. polyethylene) and shows much promise for diverse applications in the future.
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Affiliation(s)
- Manfred Manßen
- The Department of Chemistry
- The University of British Columbia
- Vancouver
- Canada
| | - Laurel L. Schafer
- The Department of Chemistry
- The University of British Columbia
- Vancouver
- Canada
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33
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Aldrich KE, Odom AL. A silica-supported titanium catalyst for heterogeneous hydroamination and multicomponent coupling reactions. Dalton Trans 2019; 48:11352-11360. [PMID: 31281914 DOI: 10.1039/c9dt01835b] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Highly dehydrated silica gel, SiO2700, gave a material with a total surface hydroxyl density of 0.31 ± 0.05 mmol g-1, 0.9 ± 0.1 Si-OH sites per nm2. Treatment of this material with Ti(NMe2)4 gave Ti(NMe2)3/SiO2700, which is 1.50% ± 0.07 Ti, where the titanium is bound to the surface, on average, through a single O-Si-Ti linkage. This material was tested for its properties as a catalyst for C-N bond forming reactions and was found to be a competent alkyne hydroamination and iminoamination catalyst. For iminoamination, which is the 3-component coupling of an alkyne, primary amine, and isonitrile, this heterogeneous catalyst was able to carry out some catalyses faster than previously reported homogeneous catalysts with lower catalyst loadings. The material is also a catalyst for the addition of aniline to dicyclohexylcarbodiimide to form a substituted guanidine. In addition, a known quinoline with biological activity was prepared using the heterogeneous catalyst in a one-pot procedure using half the catalyst loading of the previously reported synthesis.
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Affiliation(s)
- Kelly E Aldrich
- Department of Chemistry, Michigan State University, 578 S Shaw Ln, East Lansing, MI, 48824 USA.
| | - Aaron L Odom
- Department of Chemistry, Michigan State University, 578 S Shaw Ln, East Lansing, MI, 48824 USA.
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34
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Vchislo NV. α,β‐Unsaturated Aldehydes as C‐Building Blocks in the Synthesis of Pyridines, 1,4‐Dihydropyridines and 1,2‐Dihydropyridines. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900275] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- N. V. Vchislo
- A. E. Favorsky Irkutsk Institute of ChemistrySiberian Branch of the Russian Academy of Sciences 1 Favorsky Street 664033 Irkutsk Russian Federation
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35
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36
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Uredi D, Motati DR, Watkins EB. A simple, tandem approach to the construction of pyridine derivatives under metal-free conditions: a one-step synthesis of the monoterpene natural product, (−)-actinidine. Chem Commun (Camb) 2019; 55:3270-3273. [DOI: 10.1039/c9cc01097a] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
(−)-Actinidine, along with various diversely substituted pyridines were synthesized from simple starting materials, including natural products, using a mild and metal-free method.
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Affiliation(s)
- Dilipkumar Uredi
- Department of Pharmaceutical Sciences, College of Pharmacy, Union University
- Jackson
- USA
| | - Damoder Reddy Motati
- Department of Pharmaceutical Sciences, College of Pharmacy, Union University
- Jackson
- USA
| | - E. Blake Watkins
- Department of Pharmaceutical Sciences, College of Pharmacy, Union University
- Jackson
- USA
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37
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Michon C, Gilbert J, Trivelli X, Nahra F, Cazin CSJ, Agbossou-Niedercorn F, Nolan SP. Gold(i) catalysed regio- and stereoselective intermolecular hydroamination of internal alkynes: towards functionalised azoles. Org Biomol Chem 2019; 17:3805-3811. [DOI: 10.1039/c9ob00587k] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Vinyl- and saturated azoles were synthesised through gold(i) catalysed regio- and stereoselective intermolecular hydroamination of internal alkynes and subsequent hydrogenation.
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Affiliation(s)
| | | | - Xavier Trivelli
- UGSF CNRS
- UMR 8576
- Univ. Lille
- 59655 Villeneuve d'Ascq Cedex
- France
| | - Fady Nahra
- Department of Chemistry
- Ghent University
- 9000 Gent
- Belgium
| | | | | | - Steven P. Nolan
- Department of Chemistry
- Ghent University
- 9000 Gent
- Belgium
- Department of Chemistry
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