1
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Jia L, Wang T, Chen J, Zhao H, Yao P, Fan B. B(C 6F 5) 3/Chiral Phosphoric Acid Promoted Asymmetric C-3 gem-Difluoroalkylation of Quinoxalin-2-ones with Difluoroenoxysilanes. Org Lett 2024; 26:6551-6555. [PMID: 39078262 DOI: 10.1021/acs.orglett.4c01958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/31/2024]
Abstract
The asymmetric Mannich-type reaction of quinoxalin-2-ones with difluoroenoxysilanes has been developed for the synthesis of chiral gem-difluoroalkylated quinoxalin-2-ones. The reaction worked in the presence of chiral phosphoric acid CPA 1 and B(C6F5)3 in THF at room temperature. The reaction exhibited a good substrate scope furnishing the products in good yields (up to 97%) with up to 96% ee.
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Affiliation(s)
- Li Jia
- Yunnan Key Laboratory of Chiral Functional Substance Research and Application, Yunnan Minzu University, Yuehua Street, Kunming 650504, China
| | - Ting Wang
- Yunnan Key Laboratory of Chiral Functional Substance Research and Application, Yunnan Minzu University, Yuehua Street, Kunming 650504, China
| | - Jingchao Chen
- Yunnan Key Laboratory of Chiral Functional Substance Research and Application, Yunnan Minzu University, Yuehua Street, Kunming 650504, China
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University, Yuehua Street, Kunming 650500, China
| | - Hongyan Zhao
- Yunnan Key Laboratory of Chiral Functional Substance Research and Application, Yunnan Minzu University, Yuehua Street, Kunming 650504, China
| | - Pengjie Yao
- Yunnan Key Laboratory of Chiral Functional Substance Research and Application, Yunnan Minzu University, Yuehua Street, Kunming 650504, China
| | - Baomin Fan
- Yunnan Key Laboratory of Chiral Functional Substance Research and Application, Yunnan Minzu University, Yuehua Street, Kunming 650504, China
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yunnan Minzu University, Yuehua Street, Kunming 650500, China
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2
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Long CJ, Pu HP, Zhao YN, He YH, Guan Z. Cooperative photocatalysis and l-/ d-proline catalysis enables enantioselective oxidative cross-dehydrogenative coupling of acyclic benzylic secondary amines with ketones. Org Chem Front 2023. [DOI: 10.1039/d2qo01956f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
Abstract
We developed an enantioselective cross-dehydrogenative coupling of acyclic benzylic secondary amines with ketones by combining photocatalysis and l-/d-proline catalysis.
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3
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Xie R, Liu C, Lin R, Zhang R, Huang H, Chang M. 1,2-Diamines as the Amine Sources in Amidation and Rhodium-Catalyzed Asymmetric Reductive Amination Cascade Reactions. Org Lett 2022; 24:5646-5650. [PMID: 35916628 DOI: 10.1021/acs.orglett.2c01728] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The sturdy chelation of 1,2-diamines and transition-metals would retard or even interrupt the routine catalytic cycles. In the amidation and asymmetric reductive amination (ARA) cascade reactions of diamines and ketoesters, we deployed sets of additives to ensure a smooth transformation catalyzed by the complexes of rhodium and versatile and highly modular phosphoramidite-phosphine ligands. The tunability of the ligands was fully exploited to accommodate various diamines and α-ketoesters for the efficient synthesis of chiral 3,4-dihydroquinoxalinones.
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Affiliation(s)
- Rongrong Xie
- College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Cungang Liu
- College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Renwei Lin
- College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Runchen Zhang
- College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Haizhou Huang
- College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Mingxin Chang
- College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China.,College of Plant Protection, Shaanxi Research Center of Biopesticide Engineering & Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
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4
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Karjee P, Mishra M, Debnath B, Punniyamurthy T. Expedient Ni(OTf) 2/visible light photoredox-catalyzed annulation of donor-acceptor cyclopropanes with cyclic secondary amines. Chem Commun (Camb) 2022; 58:8670-8673. [PMID: 35822543 DOI: 10.1039/d2cc02941c] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The annulative coupling of donor-acceptor cyclopropanes with cyclic secondary amines is reported using the combination of Ni(OTf)2 and visible light assisted eosin Y catalysis for tandem C-N and C-C bond formation. The reaction sequence provides a potential synthetic tool for the construction of pyrrolotetrahydroisoquinolines.
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Affiliation(s)
- Pallab Karjee
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, India.
| | - Manmath Mishra
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, India.
| | - Bijoy Debnath
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, India.
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5
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Iordanidou D, Kallitsakis MG, Tzani MA, Ioannou DI, Zarganes-Tzitzikas T, Neochoritis CG, Dömling A, Terzidis MA, Lykakis IN. Supported Gold Nanoparticle-Catalyzed Selective Reduction of Multifunctional, Aromatic Nitro Precursors into Amines and Synthesis of 3,4-Dihydroquinoxalin-2-Ones. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27144395. [PMID: 35889270 PMCID: PMC9323044 DOI: 10.3390/molecules27144395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 07/05/2022] [Accepted: 07/06/2022] [Indexed: 11/16/2022]
Abstract
The synthesis of 3,4-dihydroquinoxalin-2-ones via the selective reduction of aromatic, multifunctional nitro precursors catalyzed by supported gold nanoparticles is reported. The reaction proceeds through the in situ formation of the corresponding amines under heterogeneous transfer hydrogenation of the initial nitro compounds catalyzed by the commercially available Au/TiO2-Et3SiH catalytic system, followed by an intramolecular C-N transamidation upon treatment with silica acting as a mild acid. Under the present conditions, the Au/TiO2-TMDS system was also found to catalyze efficiently the present selective reduction process. Both transfer hydrogenation processes showed very good functional-group tolerance and were successfully applied to access more structurally demanding products bearing other reducible moieties such as chloro, aldehyde or methyl ketone. An easily scalable (up to 1 mmol), low catalyst loading (0.6 mol%) synthetic protocol was realized, providing access to this important scaffold. Under these mild catalytic conditions, the desired products were isolated in good to high yields and with a TON of 130. A library analysis was also performed to demonstrate the usefulness of our synthetic strategy and the physicochemical profile of the derivatives.
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Affiliation(s)
- Domna Iordanidou
- Department of Chemistry, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece; (D.I.); (M.G.K.); (M.A.T.); (D.I.I.)
- Department of Nutritional Sciences and Dietetics, International Hellenic University, Sindos Campus, 57400 Thessaloniki, Greece
| | - Michael G. Kallitsakis
- Department of Chemistry, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece; (D.I.); (M.G.K.); (M.A.T.); (D.I.I.)
| | - Marina A. Tzani
- Department of Chemistry, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece; (D.I.); (M.G.K.); (M.A.T.); (D.I.I.)
| | - Dimitris I. Ioannou
- Department of Chemistry, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece; (D.I.); (M.G.K.); (M.A.T.); (D.I.I.)
| | | | | | - Alexander Dömling
- Department of Pharmacy, University of Groningen, A. Deusinglaan 1, 9700 AV Groningen, The Netherlands;
| | - Michael A. Terzidis
- Department of Nutritional Sciences and Dietetics, International Hellenic University, Sindos Campus, 57400 Thessaloniki, Greece
- Correspondence: (M.A.T.); (I.N.L.)
| | - Ioannis N. Lykakis
- Department of Chemistry, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece; (D.I.); (M.G.K.); (M.A.T.); (D.I.I.)
- Correspondence: (M.A.T.); (I.N.L.)
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6
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Tammisetti R, Hong BC, Chien SY, Lee GH. Stereoselective Cyclization Cascade of Dihydroquinoxalinones by Visible-Light Photocatalysis: Access to the Polycyclic Quinoxalin-2(1 H)-ones. Org Lett 2022; 24:5155-5160. [PMID: 35802069 DOI: 10.1021/acs.orglett.2c01991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An intriguing stereoselective visible-light photocatalysis of dihydroquinoxalinone derivatives has been realized via cyclization with or without the solvolysis cascade. The reactions provided the polycyclic ring structures with efficient formation of multiple bonds and with high stereoselectivity. X-ray crystallography unequivocally determined the structures of five polycyclic products.
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Affiliation(s)
| | - Bor-Cherng Hong
- Department of Chemistry and Biochemistry, National Chung Cheng University, Chia-Yi 621, Taiwan, R.O.C
| | - Su-Ying Chien
- Instrumentation Center, National Taiwan University, Taipei 106, Taiwan, R.O.C
| | - Gene-Hsiang Lee
- Instrumentation Center, National Taiwan University, Taipei 106, Taiwan, R.O.C
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7
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Rostoll-Berenguer J, Martín-López M, Blay G, Pedro JR, Vila C. Radical Addition of Dihydroquinoxalin-2-ones to Trifluoromethyl Ketones under Visible-Light Photoredox Catalysis. J Org Chem 2022; 87:9343-9356. [PMID: 35790099 PMCID: PMC9295130 DOI: 10.1021/acs.joc.2c01139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
A visible-light photocatalytic
radical addition reaction of dihydroquinoxalin-2-ones
to trifluoromethyl ketones has been established using Ru(bpy)3Cl2 as photocatalyst, acetonitrile as solvent,
and HP Single Blue LED as the source of light. The reaction provides
a straightforward approach to the synthesis of dihydroquinoxalin-2-ones
bearing a trifluoromethyl-substituted tertiary alcohol moiety in moderate
to good yields under mild conditions.
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Affiliation(s)
- Jaume Rostoll-Berenguer
- Departament de Química Orgànica, Facultat de Química, Universitat de València, Dr. Moliner 50, 46100 Burjassot, València, Spain
| | - María Martín-López
- Departament de Química Orgànica, Facultat de Química, Universitat de València, Dr. Moliner 50, 46100 Burjassot, València, Spain
| | - Gonzalo Blay
- Departament de Química Orgànica, Facultat de Química, Universitat de València, Dr. Moliner 50, 46100 Burjassot, València, Spain
| | - José R Pedro
- Departament de Química Orgànica, Facultat de Química, Universitat de València, Dr. Moliner 50, 46100 Burjassot, València, Spain
| | - Carlos Vila
- Departament de Química Orgànica, Facultat de Química, Universitat de València, Dr. Moliner 50, 46100 Burjassot, València, Spain
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8
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Hussain Y, Sharma D, Kotwal N, Kumar I, Chauhan P. Stereoselective Oxidative Mannich Reaction of Ketones with Dihydrodibenzo-Oxazepines via a Merger of Photoredox-/Electro-Catalysis with Organocatalysis. CHEMSUSCHEM 2022; 15:e202200415. [PMID: 35343096 DOI: 10.1002/cssc.202200415] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 03/25/2022] [Indexed: 06/14/2023]
Abstract
An enantio- and diastereoselective sp3 -sp3 coupling of acyclic/cyclic ketones with dihydrodibenzo-oxazepines has been developed by merging visible light photo-redox- or electro-catalysis with organocatalysis. This approach parallelly utilizes Eosin Y or graphite electrodes for the co-catalyst-free oxidative conversion of dihydrodibenzo-oxazepines to oxazepines, followed by L-Proline catalyzed direct Mannich-type reaction with ketones. A series of enantioenriched dihydrodibenzo-oxazepines have been prepared in high yields and enantioselectivity. This method shows substantial advantages over the existing protocols by using potentially safer starting materials and cheap commercially available catalysts.
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Affiliation(s)
- Yaseen Hussain
- Department of Chemistry, Indian Institute of Technology Jammu Jagti, NH-44, Nagrota Bypass, Jammu, 181221, J&K, India
| | - Deepak Sharma
- Department of Chemistry, Indian Institute of Technology Jammu Jagti, NH-44, Nagrota Bypass, Jammu, 181221, J&K, India
| | - Namrata Kotwal
- Department of Chemistry, Indian Institute of Technology Jammu Jagti, NH-44, Nagrota Bypass, Jammu, 181221, J&K, India
| | - Indresh Kumar
- Department of Chemistry, Birla Institute of Technology and Science, Pilani, 333031, Rajasthan, India
| | - Pankaj Chauhan
- Department of Chemistry, Indian Institute of Technology Jammu Jagti, NH-44, Nagrota Bypass, Jammu, 181221, J&K, India
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9
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Roy S, Paul H, Chatterjee I. Light‐Mediated Aminocatalysis: The Dual‐Catalytic Ability Enabling New Enantioselective Route. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Sourav Roy
- IIT Ropar: Indian Institute of Technology Ropar Chemistry INDIA
| | - Hrishikesh Paul
- IIT Ropar: Indian Institute of Technology Ropar Chemistry INDIA
| | - Indranil Chatterjee
- Indian Institute of Technology, Ropar Chemistry Nangal Road 140001 Rupnagar INDIA
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10
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Long CJ, He YH, Guan Z. Asymmetric oxidative Mannich reactions promoted by photocatalysis and electrochemistry. Org Biomol Chem 2022; 20:2544-2561. [PMID: 35266948 DOI: 10.1039/d2ob00054g] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The asymmetric Mannich reaction is an essential method in contemporary organic chemistry. As a representative of clean and green synthesis methods, photochemical and electrochemical oxidation strategies have re-emerged in recent years, providing new ideas for asymmetric Mannich reactions. Numerous chiral β-amino carbonyl compounds have been accessed in satisfactory yields with excellent enantioselectivity via such novel asymmetric oxidative Mannich reactions. This minireview highlights plentiful advances in asymmetric oxidative Mannich reactions that rely on photoredox or anodic-oxidation and covers the literature from 2014 to date. Furthermore, the future development of this field is envisaged.
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Affiliation(s)
- Chao-Jiu Long
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
| | - Yan-Hong He
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
| | - Zhi Guan
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
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11
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Yao W, Bergamino EAB, Ngai MY. Asymmetric Photocatalysis Enabled by Chiral Organocatalysts. ChemCatChem 2022; 14:e202101292. [PMID: 36204304 PMCID: PMC9531867 DOI: 10.1002/cctc.202101292] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Visible-light photocatalysis has advanced as a versatile tool in organic synthesis. However, attaining precise stereocontrol in photocatalytic reactions has been a longstanding challenge due to undesired photochemical background reactions and the involvement of highly reactive radicals or radical ion intermediates generated under photocatalytic conditions. To address this problem and expand the synthetic utility of photocatalytic reactions, a number of innovative strategies, including mono- and dual-catalytic approaches, have recently emerged. Of these, exploiting chiral organocatalysis, such as enamine catalysis, iminium-ion catalysis, Brønsted acid/base catalysis, and N-heterocyclic carbene catalysis, to induce chirality transfer of photocatalytic reactions has been widely explored. This Review aims to provide a current, comprehensive overview of asymmetric photocatalytic reactions enabled by chiral organocatalysts published through June 2021. The substrate scope, advantages, limitations, and proposed reaction mechanisms of each reaction are discussed. This review should serve as a reference for the development of visible-light-induced asymmetric photocatalysis and promote the improvement of the chemical reactivity and stereoselectivity of these reactions.
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Affiliation(s)
- Wang Yao
- Department of Chemistry, the State University of New York at Stony Brook, Stony Brook, New York, 11794
| | | | - Ming-Yu Ngai
- Department of Chemistry, the State University of New York at Stony Brook, Stony Brook, New York, 11794,Institute of Chemical Biology and Drug Discovery, the State University of New York at Stony Brook, Stony Brook, New York 11794,corresponding author (Prof. Dr. Ming-Yu Ngai): , Twitter accounts: @NgaiLab; @StonyBrookChem
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12
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Li C, Zhang S, Li S, Feng Y, Fan QH. Ruthenium-catalyzed enantioselective hydrogenation of quinoxalinones and quinazolinones. Org Chem Front 2022. [DOI: 10.1039/d1qo01598b] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
An efficient Ru-catalyzed asymmetric hydrogenation of quinoxalinone and quinazolinone derivatives has been developed, providing a facile access to chiral dihydroquinoxalinones and dihydroquinazolinones with excellent enantioselectivities.
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Affiliation(s)
- Chenghao Li
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences (CAS), and University of Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Shuxin Zhang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences (CAS), and University of Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Shan Li
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences (CAS), and University of Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Yu Feng
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences (CAS), and University of Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Qing-Hua Fan
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences (CAS), and University of Chinese Academy of Sciences, Beijing 100190, P. R. China
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13
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Xu D, Huang F, Tang L, Zhang X, Zhang W. Visible Light-Induced Hydroxyalkylation of Heteroarenes with Aliphatic Alcohols. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202112032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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14
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Yao Z, Zhang X, Luo Z, Pan Y, Zhao H, Li B, Xu L, Shi Q, Fan Q. Na
2
S
2
O
8
‐Mediated Tandem One‐Pot Construction of 3,3‐Disubsituted 3,4‐Dihydroquinoxalin‐2(1
H
)‐ones with 4‐Alkyl‐1,4‐dihydropyridines as Alkyl Radical Sources. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202100609] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Zhen Yao
- Department of Chemistry Renmin University of China Beijing 100872 P. R. China
| | - Xin Zhang
- Department of Chemistry Renmin University of China Beijing 100872 P. R. China
| | - Zhenli Luo
- Department of Chemistry Renmin University of China Beijing 100872 P. R. China
| | - Yixiao Pan
- Department of Chemistry Renmin University of China Beijing 100872 P. R. China
| | - Haoqiang Zhao
- Department of Chemistry Renmin University of China Beijing 100872 P. R. China
| | - Bohan Li
- Department of Chemistry Renmin University of China Beijing 100872 P. R. China
| | - Lijin Xu
- Department of Chemistry Renmin University of China Beijing 100872 P. R. China
| | - Qian Shi
- College of Chemistry & Materials Engineering Wenzhou University Wenzhou 325035 P. R. China
| | - Qing‐Hua Fan
- Institute of Chemistry Chinese Academy of Sciences
- University of Chinese Academy of Sciences Beijing 100190 P. R. China
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15
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Volpe C, Meninno S, Crescenzi C, Mancinelli M, Mazzanti A, Lattanzi A. Catalytic Enantioselective Access to Dihydroquinoxalinones via Formal α‐Halo Acyl Halide Synthon in One Pot. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202110173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Chiara Volpe
- Dipartimento di Chimica e Biologia “A. Zambelli” Università di Salerno Via Giovanni Paolo II 132-84084 Fisciano Italy
| | - Sara Meninno
- Dipartimento di Chimica e Biologia “A. Zambelli” Università di Salerno Via Giovanni Paolo II 132-84084 Fisciano Italy
| | - Carlo Crescenzi
- Dipartimento di Farmacia Università di Salerno Via Giovanni Paolo II 132-84084 Fisciano Italy
| | - Michele Mancinelli
- Dipartimento di Chimica Industriale Università di Bologna Viale Risorgimento 4-40136 Bologna Italy
| | - Andrea Mazzanti
- Dipartimento di Chimica Industriale Università di Bologna Viale Risorgimento 4-40136 Bologna Italy
| | - Alessandra Lattanzi
- Dipartimento di Chimica e Biologia “A. Zambelli” Università di Salerno Via Giovanni Paolo II 132-84084 Fisciano Italy
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16
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Volpe C, Meninno S, Crescenzi C, Mancinelli M, Mazzanti A, Lattanzi A. Catalytic Enantioselective Access to Dihydroquinoxalinones via Formal α-Halo Acyl Halide Synthon in One Pot. Angew Chem Int Ed Engl 2021; 60:23819-23826. [PMID: 34437760 PMCID: PMC8596509 DOI: 10.1002/anie.202110173] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Indexed: 11/25/2022]
Abstract
An enantioselective one-pot catalytic strategy to dihydroquinoxalinones, featuring novel 1-phenylsulfonyl-1-cyano enantioenriched epoxides as masked α-halo acyl halide synthons, followed by a domino ring-opening cyclization (DROC), is documented. A popular quinine-derived urea served as the catalyst in two out of the three steps performed in the same solvent using commercially available aldehydes, (phenylsulfonyl)acetonitrile, cumyl hydroperoxide and 1,2-phenylendiamines. Medicinally relevant 3-aryl/alkyl-substituted heterocycles are isolated in generally good to high overall yield and high enantioselectivity (up to 99 % ee). A rare example of excellent reusability of an organocatalyst at higher scale, subjected to oxidative conditions, is demonstrated. Mechanistically, labile α-ketosulfone has been detected as the intermediate involved in the DROC process. Theoretical calculations on the key epoxidation step rationalize the observed stereocontrol, highlighting the important role played by the sulfone group.
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Affiliation(s)
- Chiara Volpe
- Dipartimento di Chimica e Biologia “A. Zambelli”Università di SalernoVia Giovanni Paolo II132-84084FiscianoItaly
| | - Sara Meninno
- Dipartimento di Chimica e Biologia “A. Zambelli”Università di SalernoVia Giovanni Paolo II132-84084FiscianoItaly
| | - Carlo Crescenzi
- Dipartimento di FarmaciaUniversità di SalernoVia Giovanni Paolo II132-84084FiscianoItaly
| | - Michele Mancinelli
- Dipartimento di Chimica IndustrialeUniversità di BolognaViale Risorgimento4-40136BolognaItaly
| | - Andrea Mazzanti
- Dipartimento di Chimica IndustrialeUniversità di BolognaViale Risorgimento4-40136BolognaItaly
| | - Alessandra Lattanzi
- Dipartimento di Chimica e Biologia “A. Zambelli”Università di SalernoVia Giovanni Paolo II132-84084FiscianoItaly
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17
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Recent Advances in Selected Asymmetric Reactions Promoted by Chiral Catalysts: Cyclopropanations, Friedel–Crafts, Mannich, Michael and Other Zinc-Mediated Processes—An Update. Symmetry (Basel) 2021. [DOI: 10.3390/sym13101762] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
The main purpose of this review article is to present selected asymmetric synthesis reactions in which chemical and stereochemical outcomes are dependent on the use of an appropriate chiral catalyst. Optically pure or enantiomerically enriched products of such transformations may find further applications in various fields. Among an extremely wide variety of asymmetric reactions catalyzed by chiral systems, we are interested in: asymmetric cyclopropanation, Friedel–Crafts reaction, Mannich and Michael reaction, and other stereoselective processes conducted in the presence of zinc ions. This paper describes the achievements of the above-mentioned asymmetric transformations in the last three years. The choice of reactions is related to the research that has been carried out in our laboratory for many years.
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18
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Wan S, Wang J, Huo C. Copper catalyzed aerobic oxidative amination of 3,4-dihydroquinoxalin-2(1H)-ones. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153271] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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19
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Bell JD, Murphy JA. Recent advances in visible light-activated radical coupling reactions triggered by (i) ruthenium, (ii) iridium and (iii) organic photoredox agents. Chem Soc Rev 2021; 50:9540-9685. [PMID: 34309610 DOI: 10.1039/d1cs00311a] [Citation(s) in RCA: 139] [Impact Index Per Article: 46.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Photoredox chemistry with organic or transition metal agents has been reviewed in earlier years, but such is the pace of progress that we will overlap very little with earlier comprehensive reviews. This review first presents an overview of the area of research and then examines recent examples of C-C, C-N, C-O and C-S bond formations via radical intermediates with transition metal and organic radical promoters. Recent successes with Birch reductions are also included. The transition metal chemistry will be restricted to photocatalysts based on the most widely used metals, Ru and Ir, but includes coupling chemistries that take advantage of low-valent nickel, or occasionally copper, complexes to process the radicals that are formed. Our focus is on developments in the past 10 years (2011-2021). This period has also seen great advances in the chemistry of organic photoredox reagents and the review covers this area. The review is intended to present highlights and is not comprehensive.
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Affiliation(s)
- Jonathan D Bell
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK.
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20
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Rostoll-Berenguer J, Capella-Argente M, Blay G, Pedro JR, Vila C. Visible-light-accelerated amination of quinoxalin-2-ones and benzo[1,4]oxazin-2-ones with dialkyl azodicarboxylates under metal and photocatalyst-free conditions. Org Biomol Chem 2021; 19:6250-6255. [PMID: 34231626 DOI: 10.1039/d1ob01157j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A direct sp3 C-H amination of cyclic amines (dihydroquinoxalinones and dihydrobenzoxazinones) with dialkyl azo dicarboxylates accelerated by visible-light irradiation under metal and photocatalyst-free conditions is described. This protocol features very mild reaction conditions for the synthesis of aminal quinoxaline and benzoxazine derivatives with good to high yields (up to 99%). These aminal derivatives respresent versatile building blocks for the divergent synthesis of quinoxalin-2-one derivatives.
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Affiliation(s)
- Jaume Rostoll-Berenguer
- Departament de Química Orgànica, Facultat de Química, Universitat de València, Dr. Moliner 50, 46100 Burjassot, València, Spain.
| | - Murta Capella-Argente
- Departament de Química Orgànica, Facultat de Química, Universitat de València, Dr. Moliner 50, 46100 Burjassot, València, Spain.
| | - Gonzalo Blay
- Departament de Química Orgànica, Facultat de Química, Universitat de València, Dr. Moliner 50, 46100 Burjassot, València, Spain.
| | - José R Pedro
- Departament de Química Orgànica, Facultat de Química, Universitat de València, Dr. Moliner 50, 46100 Burjassot, València, Spain.
| | - Carlos Vila
- Departament de Química Orgànica, Facultat de Química, Universitat de València, Dr. Moliner 50, 46100 Burjassot, València, Spain.
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21
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Xiao X, Shao B, Lu Y, Cao Q, Xia C, Chen F. Recent Advances in Asymmetric Organomulticatalysis. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000961] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Xiao Xiao
- Institute of Pharmaceutical Science and Technology Zhejiang University of Technology Hangzhou 310014 People's Republic China
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals Zhejiang University of Technology Hangzhou 310014 People's Republic China
| | - Bing‐Xuan Shao
- Institute of Pharmaceutical Science and Technology Zhejiang University of Technology Hangzhou 310014 People's Republic China
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals Zhejiang University of Technology Hangzhou 310014 People's Republic China
| | - Yin‐Jie Lu
- Institute of Pharmaceutical Science and Technology Zhejiang University of Technology Hangzhou 310014 People's Republic China
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals Zhejiang University of Technology Hangzhou 310014 People's Republic China
| | - Qian‐Qian Cao
- Institute of Pharmaceutical Science and Technology Zhejiang University of Technology Hangzhou 310014 People's Republic China
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals Zhejiang University of Technology Hangzhou 310014 People's Republic China
| | - Chun‐Nian Xia
- Institute of Pharmaceutical Science and Technology Zhejiang University of Technology Hangzhou 310014 People's Republic China
| | - Fen‐Er Chen
- Institute of Pharmaceutical Science and Technology Zhejiang University of Technology Hangzhou 310014 People's Republic China
- Engineering Center of Catalysis and Synthesis for Chiral Molecules Fudan University Shanghai 200433 People's Republic China
- Shanghai Engineering Center of Industrial Asymmetric Catalysis for Chiral Drugs Shanghai 200433 People's Republic China
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22
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Rostoll‐Berenguer J, Blay G, Pedro JR, Vila C. Asymmetric Oxidative Mannich Reactions. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202001017] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Jaume Rostoll‐Berenguer
- Departament de Química Orgànica Facultat de Química Universitat de València Dr. Moliner 50 46100 Burjassot, València Spain
| | - Gonzalo Blay
- Departament de Química Orgànica Facultat de Química Universitat de València Dr. Moliner 50 46100 Burjassot, València Spain
| | - José R. Pedro
- Departament de Química Orgànica Facultat de Química Universitat de València Dr. Moliner 50 46100 Burjassot, València Spain
| | - Carlos Vila
- Departament de Química Orgànica Facultat de Química Universitat de València Dr. Moliner 50 46100 Burjassot, València Spain
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23
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Rostoll-Berenguer J, Blay G, Pedro JR, Vila C. Photocatalytic Giese Addition of 1,4-Dihydroquinoxalin-2-ones to Electron-Poor Alkenes Using Visible Light. Org Lett 2020; 22:8012-8017. [DOI: 10.1021/acs.orglett.0c02953] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Jaume Rostoll-Berenguer
- Departament de Quı́mica Orgànica, Facultat de Quı́mica, Universitat de València, Dr. Moliner 50, Burjassot, 46100 València, Spain
| | - Gonzalo Blay
- Departament de Quı́mica Orgànica, Facultat de Quı́mica, Universitat de València, Dr. Moliner 50, Burjassot, 46100 València, Spain
| | - José R. Pedro
- Departament de Quı́mica Orgànica, Facultat de Quı́mica, Universitat de València, Dr. Moliner 50, Burjassot, 46100 València, Spain
| | - Carlos Vila
- Departament de Quı́mica Orgànica, Facultat de Quı́mica, Universitat de València, Dr. Moliner 50, Burjassot, 46100 València, Spain
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24
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Prentice C, Morrisson J, Smith AD, Zysman-Colman E. Recent developments in enantioselective photocatalysis. Beilstein J Org Chem 2020; 16:2363-2441. [PMID: 33082877 PMCID: PMC7537410 DOI: 10.3762/bjoc.16.197] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 09/09/2020] [Indexed: 01/02/2023] Open
Abstract
Enantioselective photocatalysis has rapidly grown into a powerful tool for synthetic chemists. This review describes the various strategies for creating enantioenriched products through merging enantioselective catalysis and photocatalysis, with a focus on the most recent developments and a particular interest in the proposed mechanisms for each. With the aim of understanding the scope of each strategy, to help guide and inspire further innovation in this field.
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Affiliation(s)
- Callum Prentice
- Organic Semiconductor Centre, EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, Fife, Scotland, KY16 9ST, United Kingdom
| | - James Morrisson
- Pharmaceutical Sciences, IMED Biotech Unit, AstraZeneca, Macclesfield SK102NA, United Kingdom
| | - Andrew D Smith
- Organic Semiconductor Centre, EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, Fife, Scotland, KY16 9ST, United Kingdom
| | - Eli Zysman-Colman
- Organic Semiconductor Centre, EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, Fife, Scotland, KY16 9ST, United Kingdom
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25
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Čierna M, Markus J, Doháňošová J, Moncol J, Jakubec P, Berkeš D, Caletková O. Stereoselective Mannich Reaction Driven by Crystallization. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000774] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Michaela Čierna
- Department of Organic Chemistry Faculty of Chemical and Food Technology Slovak University of Technology Radlinského 9 812 37 Bratislava Slovak Republic
| | - Jozef Markus
- Department of Organic Chemistry Faculty of Chemical and Food Technology Slovak University of Technology Radlinského 9 812 37 Bratislava Slovak Republic
| | - Jana Doháňošová
- Central Laboratories Slovak University of Technology Bratislava Slovak Republic
| | - Ján Moncol
- Department of Inorganic Chemistry Faculty of Chemical and Food Technology Slovak University of Technology Radlinského 9 812 37 Bratislava Slovak Republic
| | - Pavol Jakubec
- Department of Organic Chemistry Faculty of Chemical and Food Technology Slovak University of Technology Radlinského 9 812 37 Bratislava Slovak Republic
| | - Dušan Berkeš
- Department of Organic Chemistry Faculty of Chemical and Food Technology Slovak University of Technology Radlinského 9 812 37 Bratislava Slovak Republic
| | - Oľga Caletková
- Department of Organic Chemistry Faculty of Chemical and Food Technology Slovak University of Technology Radlinského 9 812 37 Bratislava Slovak Republic
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26
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Direct Introduction of Sulfonamide Groups into Quinoxalin‐2(1
H
)‐ones by Cu‐Catalyzed C3‐H Functionalization. Chem Asian J 2020; 15:3365-3369. [DOI: 10.1002/asia.202000916] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Indexed: 12/14/2022]
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27
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Tan Y, Wang J, Zhang HY, Zhang Y, Zhao J. The C3-H Bond Functionalization of Quinoxalin-2(1 H)-Ones With Hypervalent Iodine(III) Reagents. Front Chem 2020; 8:582. [PMID: 32850624 PMCID: PMC7432307 DOI: 10.3389/fchem.2020.00582] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 06/05/2020] [Indexed: 12/19/2022] Open
Abstract
The modification of quinoxalin-2(1H)-ones via direct C-H bond functionalization has begun to receive widespread attention, due to quinoxalin-2(1H)-one derivatives' various biological activities and pharmaceutical properties. This mini review concentrates on the accomplishments of arylation, trifluoromethylation, alkylation, and alkoxylation of quinoxalin-2(1H)-ones with hypervalent iodine(III) reagents as reaction partners or oxidants. The reaction conditions and mechanisms are compared and discussed in detail.
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Affiliation(s)
- Yushi Tan
- Tianjin Key Laboratory of Chemical Process Safety, Hebei Provincial Key Laboratory of Green Chemical Technology & High Efficient Energy Saving, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, China
| | - Jiabo Wang
- Tianjin Key Laboratory of Chemical Process Safety, Hebei Provincial Key Laboratory of Green Chemical Technology & High Efficient Energy Saving, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, China
| | - Hong-Yu Zhang
- Tianjin Key Laboratory of Chemical Process Safety, Hebei Provincial Key Laboratory of Green Chemical Technology & High Efficient Energy Saving, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, China
| | - Yuecheng Zhang
- Tianjin Key Laboratory of Chemical Process Safety, Hebei Provincial Key Laboratory of Green Chemical Technology & High Efficient Energy Saving, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, China
| | - Jiquan Zhao
- Tianjin Key Laboratory of Chemical Process Safety, Hebei Provincial Key Laboratory of Green Chemical Technology & High Efficient Energy Saving, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, China
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28
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Rostoll‐Berenguer J, Blay G, Pedro JR, Vila C. Recent Advances in Photocatalytic Functionalization of Quinoxalin‐2‐ones. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000746] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Jaume Rostoll‐Berenguer
- Departament de Química Orgànica Facultat de Química Universitat de València Dr. Moliner 50 46100 Burjassot, València Spain
| | - Gonzalo Blay
- Departament de Química Orgànica Facultat de Química Universitat de València Dr. Moliner 50 46100 Burjassot, València Spain
| | - José R. Pedro
- Departament de Química Orgànica Facultat de Química Universitat de València Dr. Moliner 50 46100 Burjassot, València Spain
| | - Carlos Vila
- Departament de Química Orgànica Facultat de Química Universitat de València Dr. Moliner 50 46100 Burjassot, València Spain
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29
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Saha D. Catalytic Enantioselective Radical Transformations Enabled by Visible Light. Chem Asian J 2020; 15:2129-2152. [PMID: 32463981 DOI: 10.1002/asia.202000525] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 05/27/2020] [Indexed: 12/11/2022]
Abstract
Visible light has been recognized as an economical and environmentally benign source of energy that enables chemoselective molecular activation of chemical reactions and hence reveal a new horizon for the design and discovery of novel chemical transformations. On the other hand, asymmetric catalysis represents an economic method to satisfy the increasing need for enantioenriched compounds in the chemical and pharmaceutical industries. Therefore, combining visible light photocatalysis with asymmetric catalysis creates a wider range of opportunities for the development of mechanistically unique reaction schemes. However, there arise two main problems like undesirable photochemical background reactions and difficulties in controlling the stereochemistry with highly reactive photochemical intermediates which can pose a serious challenge to the development of asymmetric visible light photocatalysis. In recent years, several methods have been developed to overcome these challenges. This review summarizes the recent advances in visible light-induced enantioselective reactions. We divide our discussion into four categories: Asymmetric photoredox organocatalysis, asymmetric transition metal photoredox catalysis, asymmetric photoredox Lewis acid catalysis and asymmetric photoinduced energy transfer catalysis. Special emphasis has been given to different catalytic activation modes that enable the construction of challenging carbon-carbon and carbon-heteroatom bond in an enantioselective fashion. A brief analysis of substrate scope and limitation as well as reaction mechanism of these reactions has been included.
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Affiliation(s)
- Debajyoti Saha
- Department of Chemistry, Krishnagar Govt. College, Krishnagar, Nadia, 741101, India
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30
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Hong BC. Enantioselective synthesis enabled by visible light photocatalysis. Org Biomol Chem 2020; 18:4298-4353. [PMID: 32458948 DOI: 10.1039/d0ob00759e] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Enantioselective photoreaction has been a synthetic challenge for decades. With the continuous development of modern visible light photocatalysis and asymmetric catalysis, remarkable advances have been achieved through the synergistic action of these catalytic reactions, allowing the construction of various enantiomerically enriched molecules that were once inaccessible using photocatalytic reactions. This review presents some of the contemporary developments in enantioselective visible-light photocatalysis reactions, covering the period from 2008 to March 2020, with the contents classified by catalysis type.
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Affiliation(s)
- Bor-Cherng Hong
- Department of Chemistry and Biochemistry, National Chung Cheng University, Chia-Yi, 621, Taiwan, Republic of China.
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31
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Yang X, Xie Z, Li Y, Zhang Y. Enantioselective aerobic oxidative cross-dehydrogenative coupling of glycine derivatives with ketones and aldehydes via cooperative photoredox catalysis and organocatalysis. Chem Sci 2020; 11:4741-4746. [PMID: 34122929 PMCID: PMC8159221 DOI: 10.1039/d0sc00683a] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
The combination of photoredox catalysis and enamine catalysis has enabled the development of an enantioselective aerobic oxidative cross-dehydrogenative coupling between glycine derivatives and simple ketones or aldehydes, which provides an efficient approach for the rapid synthesis of enantiopure unnatural α-alkyl α-amino acid derivatives in good yield with excellent diastereo- (up to >99 : 1) and enantioselectivities (up to 97% ee). This process includes the direct photoinduced oxidation of glycine derivatives to an imine intermediate, followed by the asymmetric Mannich-type reaction with an enamine intermediate generated in situ from a ketone or aldehyde and a chiral secondary amine organocatalyst. This mild method allows the direct formation of a C–C bond with simultaneous installation of two new stereocenters without wasteful removal of functional groups. A visible-light-induced enantioselective aerobic oxidative cross-dehydrogenative coupling between glycine derivatives and simple ketones or aldehydes is achieved.![]()
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Affiliation(s)
- Xiaorong Yang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University 222 Tianshui South Road Lanzhou 730000 P. R. China
| | - Zhixiang Xie
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University 222 Tianshui South Road Lanzhou 730000 P. R. China
| | - Ying Li
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University 222 Tianshui South Road Lanzhou 730000 P. R. China
| | - Yuan Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University 222 Tianshui South Road Lanzhou 730000 P. R. China
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32
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Outin J, Quellier P, Bélanger G. Sequential One-Pot Vilsmeier-Haack and Organocatalyzed Mannich Cyclizations to Functionalized Benzoindolizidines and Benzoquinolizidines. J Org Chem 2020; 85:4712-4729. [PMID: 32189502 DOI: 10.1021/acs.joc.9b03449] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The development of new one-pot sequential cyclizations involving a Vilsmeier-Haack reaction followed by an organocatalyzed Mannich reaction is reported. This synthetic strategy gives access to functionalized indolizidines and quinolizidines in one operation from readily synthesized precursors. Yields and diastereoselectivities are good to excellent when formamides are used to trigger the key step, bearing either an electron-rich aryl or a pyrrole as the nucleophilic partner in the first cyclization.
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Affiliation(s)
- Johanne Outin
- Département de Chimie, Université de Sherbrooke, 2500 boulevard Université, Sherbrooke, Québec J1K 2R1, Canada
| | - Pauline Quellier
- Département de Chimie, Université de Sherbrooke, 2500 boulevard Université, Sherbrooke, Québec J1K 2R1, Canada
| | - Guillaume Bélanger
- Département de Chimie, Université de Sherbrooke, 2500 boulevard Université, Sherbrooke, Québec J1K 2R1, Canada
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