1
|
Ren M, Yu S, Li X, Yuan W, Lu J, Xiong Y, Liu H, Wang J, Wei J. Synthesis of gem-Difluorohomoallyl Amines via a Transition-Metal-Free Defluorinative Alkylation of Benzyl Amines with Trifluoromethyl Alkenes. J Org Chem 2024; 89:8342-8356. [PMID: 38819657 DOI: 10.1021/acs.joc.4c00084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2024]
Abstract
A mild and transition-metal-free defluorinative alkylation of benzyl amines with trifluoromethyl alkenes is reported. The features of this protocol are easy-to-obtain starting materials, a wide range of substrates, and functional group tolerance as well as high atom economy, thus offering a strategy to access a variety of gem-difluorohomoallyl amines, which are extensively distributed in pharmaceuticals and bioactive agents, with excellent chemoselectivity. The primary products can be further transformed to a diversity of 2-fluorinated pyrroline compounds.
Collapse
Affiliation(s)
- Man Ren
- Green Pharmaceutical Technology Key Laboratory of Luzhou City, Central Nervous System Drug Key Laboratory of Sichuan Province, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Shengjiao Yu
- Department of Chemistry, School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Xuefeng Li
- Green Pharmaceutical Technology Key Laboratory of Luzhou City, Central Nervous System Drug Key Laboratory of Sichuan Province, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Wenlong Yuan
- Green Pharmaceutical Technology Key Laboratory of Luzhou City, Central Nervous System Drug Key Laboratory of Sichuan Province, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Ji Lu
- Green Pharmaceutical Technology Key Laboratory of Luzhou City, Central Nervous System Drug Key Laboratory of Sichuan Province, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Ying Xiong
- Green Pharmaceutical Technology Key Laboratory of Luzhou City, Central Nervous System Drug Key Laboratory of Sichuan Province, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Hongliang Liu
- School of Chemistry and Chemical Engineering, Yantai University, Yantai, Shandong 265500, China
| | - Jun Wang
- Green Pharmaceutical Technology Key Laboratory of Luzhou City, Central Nervous System Drug Key Laboratory of Sichuan Province, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Jun Wei
- Green Pharmaceutical Technology Key Laboratory of Luzhou City, Nuclear Medicine and Molecular Imaging Key Laboratory of Sichuan Province, Central Nervous System Drug Key Laboratory of Sichuan Province, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan 646000, China
| |
Collapse
|
2
|
Jia ZH, Chen LY, Zheng H, Li ZR, Song QC, Li Y. Enantioselective Synthesis of Diarylmethylamines through the Aza-Friedel-Crafts Reaction of 1,3,5-Trialkoxy Benzenes and N-Sulfonyl Aldimines Catalyzed by BINOL-Derived Disulfonimides. J Org Chem 2023. [PMID: 37384900 DOI: 10.1021/acs.joc.3c00226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/01/2023]
Abstract
A 1,1'-bi-2-naphthol (BINOL)-derived disulfonimide (DSI)-catalyzed enantioselective aza-Friedel-Crafts reaction between 1,3,5-trialkoxy benzenes and N-sulfonyl aldimines gives direct access to a series of chiral diarylmethylamines in good yields and good to excellent enantioselectivities (up to 97% ee). This reaction provides a useful protocol for the direct synthesis of diarylmethylamine derivatives.
Collapse
Affiliation(s)
- Zi-Hao Jia
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
| | - Ling-Yan Chen
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
- Key Laboratory of Specially Functional Polymeric Materials and Related Technology (Ministry of Education), East China University of Science and Technology, Shanghai 200237, China
| | - Hao Zheng
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
| | - Zhang-Rui Li
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
| | - Qing-Chun Song
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
| | - Ya Li
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
| |
Collapse
|
3
|
Huang W, Zheng Y, Keess S, Molander GA. A General and Modular Approach to BCP Alkylamines via Multicomponent Difunctionalization of [1.1.1]Propellane. J Am Chem Soc 2023; 145:5363-5369. [PMID: 36802571 DOI: 10.1021/jacs.2c13298] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
Over the past decade, bicyclo[1.1.1]pentane (BCP) motifs have come to the fore as valuable pharmaceutical bioisosteres of para-disubstituted benzenes. However, the limited approaches and requisite multistep syntheses of useful BCP building blocks are hampering early discovery research in medicinal chemistry. Herein we report the development of a modular strategy for the divergent preparation of functionalized BCP alkylamines. In this process, a general method to introduce fluoroalkyl groups to BCP scaffolds using readily available and easy-to-handle fluoroalkyl sulfinate salts was also developed. Moreover, this strategy can also be extended to S-centered radicals for incorporation of sulfones and thioethers into the BCP core. Overall, this multicomponent strategy enables rapid construction of BCP-type bioisosteres for applications in drug discovery.
Collapse
Affiliation(s)
- Weichen Huang
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Yongxiang Zheng
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Sebastian Keess
- Medicinal Chemistry Department, Neuroscience Discovery Research, AbbVie Deutschland GmbH & Co. KG, 67061 Ludwigshafen, Germany
| | - Gary A Molander
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| |
Collapse
|
4
|
Cho HJ, Kim YL, Kim JH. Rh(II)-Catalyzed C–N Bond Formation Using Enynones and N–H Imines: An Approach to Diarylmethylamines. J Org Chem 2022; 87:16424-16435. [DOI: 10.1021/acs.joc.2c02119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Ho-Jun Cho
- Department of Chemistry (BK21 Four), Research Institute of Natural Science, Gyeongsang National University, 52828, Jinju, Korea
| | - Ye Lim Kim
- Department of Chemistry (BK21 Four), Research Institute of Natural Science, Gyeongsang National University, 52828, Jinju, Korea
| | - Ju Hyun Kim
- Department of Chemistry (BK21 Four), Research Institute of Natural Science, Gyeongsang National University, 52828, Jinju, Korea
| |
Collapse
|
5
|
Bidusenko IA, Schmidt EY, Ushakov IA, Vashchenko AV, Protsuk NI, Orel VB, Vitkovskaya NM, Trofimov BA. Semistabilized Diazatrienyl Anions from Pyridine Imines and Acetylenes: An Access to ( Z)-Stilbene/Imidazopyridine Ensembles, Benzyl Imidazopyridines, and Beyond. J Org Chem 2022; 87:12225-12239. [PMID: 36044622 DOI: 10.1021/acs.joc.2c01372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Semistabilized diazatrienyl anions are generated by the reaction of 2-pyridylarylimines with arylacetylenes in superbase systems MOtBu (M = Li, Na, K)/DMSO at ambient temperature for 15 min. The initial intermediate N-centered propargyl-1,3-diaza-1,3,5-trienyl anions undergo intermolecular cyclization to benzyl imidazopyridine anions (formally [3 + 2] cycloaddition), further intercepting a second molecule of the starting pyridylimines or a proton of medium to afford (Z)-stilbene/imidazopyridine ensembles and benzyl imidazopyridines. The charge distribution in all intermediate anions and their synthetic evolution are consistent with quantum-chemical analysis (B2PLYPD/6-311+G**//B3LYP/6-31+G*).
Collapse
Affiliation(s)
- Ivan A Bidusenko
- E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, 1 Favorsky Str., 664033 Irkutsk, Russia
| | - Elena Yu Schmidt
- E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, 1 Favorsky Str., 664033 Irkutsk, Russia
| | - Igor A Ushakov
- E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, 1 Favorsky Str., 664033 Irkutsk, Russia
| | - Alexander V Vashchenko
- E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, 1 Favorsky Str., 664033 Irkutsk, Russia
| | - Nadezhda I Protsuk
- E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, 1 Favorsky Str., 664033 Irkutsk, Russia
| | - Vladimir B Orel
- E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, 1 Favorsky Str., 664033 Irkutsk, Russia.,Laboratory of Quantum-Chemical Modeling of Molecular Systems, Irkutsk State University, 1 K. Marx Street, 664003 Irkutsk, Russia
| | - Nadezhda M Vitkovskaya
- Laboratory of Quantum-Chemical Modeling of Molecular Systems, Irkutsk State University, 1 K. Marx Street, 664003 Irkutsk, Russia
| | - Boris A Trofimov
- E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, 1 Favorsky Str., 664033 Irkutsk, Russia
| |
Collapse
|
6
|
Ogawa S, Tobisu M. Nickel-catalyzed 1,4-aryl rearrangement of aryl N-benzylimidates via C-O and C-H bond cleavage. Chem Commun (Camb) 2022; 58:7909-7911. [PMID: 35735189 DOI: 10.1039/d2cc02355e] [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
We report herein that nickel-catalyzed reaction of aryl imidates bearing an N-benzyl group results in 1,4-migration of an O-aryl group via the cleavage of C-O and C-H bonds. This protocol allows for the benzylic C-H bond arylation of benzylamine building blocks using phenols as an aryl source to form elaborate diarylmethylamine derivatives.
Collapse
Affiliation(s)
- Satoshi Ogawa
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan.
| | - Mamoru Tobisu
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan. .,Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University, Suita, Osaka 565-0871, Japan
| |
Collapse
|
7
|
Wang B, Li M, Gao G, Sanz-Vidal A, Zheng B, Walsh PJ. Synthesis of Tryptamines from Radical Cyclization of 2-Iodoaryl Allenyl Amines and Coupling with 2-Azallyls. J Org Chem 2022; 87:8099-8103. [PMID: 35675635 DOI: 10.1021/acs.joc.2c00767] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An efficient synthesis of tryptamines is developed. Indole structures were constructed using 2-iodoaryl allenyl amines as electron acceptors and radical cyclization precursors. Radical-radical coupling of indolyl methyl radicals and azaallyl radicals led to the tryptamine derivatives. The utility and versatility of this method are showcased by the synthesis of 22 examples of tryptamines in ≤88% yield. In each case, indole formation is accompanied by in situ removal of the Boc protecting group.
Collapse
Affiliation(s)
- Bo Wang
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States.,Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Minyan Li
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Gui Gao
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States.,Department of Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Alvaro Sanz-Vidal
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States.,Departamento de Química Orgánica, Universidad de Valencia, 46100 Burjassot, Spain
| | - Bing Zheng
- Department of Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Patrick J Walsh
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| |
Collapse
|
8
|
Zou D, Han G. The Coupling of Carbon and Nitrogen Substituents with Nitroarenes:Vicarious Nucleophilic Substitution of Hydrogen in Nitroarenes. CURR ORG CHEM 2022. [DOI: 10.2174/1385272826666220509142255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract:
In recent years, nitroarenes have been extensively exploited as green, efficient electrophilic arylation reagents used in a variety of organic syntheses. Transition-metal-free cross-coupling reactions and vicarious nucleophilic substitution (VNS) have become practical and reliable synthetic methods to access momentous func-tionalized organic compounds. Thus, the introduction of various substituents into nitroarenes has attracted considerable attention as important synthetic approach-es due to their simplicity and practicality. In this review, we comprehensively summarize the coupling of several carbon and nitrogen substituents with ni-troarenes via nucleophilic substitution under mild conditions, followed by the ap-plication of these transversions in the construction of carbon and heterocyclic rings.
Collapse
Affiliation(s)
- Dong Zou
- Department of Pharmacy, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Gang Han
- Department of Pharmacy, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| |
Collapse
|
9
|
Duan S, Zi Y, Wang L, Cong J, Chen W, Li M, Zhang H, Yang X, Walsh PJ. α-Branched amines through radical coupling with 2-azaallyl anions, redox active esters and alkenes. Chem Sci 2022; 13:3740-3747. [PMID: 35432903 PMCID: PMC8966660 DOI: 10.1039/d2sc00500j] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Accepted: 03/03/2022] [Indexed: 11/21/2022] Open
Abstract
α-Branched amines are fundamental building blocks in a variety of natural products and pharmaceuticals. Herein is reported a unique cascade reaction that enables the preparation of α-branched amines bearing aryl or alkyl groups at the β- or γ-positions. The cascade is initiated by reduction of redox active esters to alkyl radicals. The resulting alkyl radicals are trapped by styrene derivatives, leading to benzylic radicals. The persistent 2-azaallyl radicals and benzylic radicals are proposed to undergo a radical-radical coupling leading to functionalized amine products. Evidence is provided that the role of the nickel catalyst is to promote formation of the alkyl radical from the redox active ester and not promote the C-C bond formation. The synthetic method introduced herein tolerates a variety of imines and redox active esters, allowing for efficient construction of amine building blocks.
Collapse
Affiliation(s)
- Shengzu Duan
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education, Yunnan Province Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University Kunming 650091 P. R. China
| | - Yujin Zi
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education, Yunnan Province Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University Kunming 650091 P. R. China
| | - Lingling Wang
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education, Yunnan Province Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University Kunming 650091 P. R. China
| | - Jielun Cong
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education, Yunnan Province Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University Kunming 650091 P. R. China
| | - Wen Chen
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education, Yunnan Province Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University Kunming 650091 P. R. China
| | - Minyan Li
- Roy and Diana Vagelos Laboratories Penn/Merck Laboratory for High-Throughput Experimentation Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia PA USA
| | - Hongbin Zhang
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education, Yunnan Province Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University Kunming 650091 P. R. China
| | - Xiaodong Yang
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education, Yunnan Province Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University Kunming 650091 P. R. China
| | - Patrick J Walsh
- Roy and Diana Vagelos Laboratories Penn/Merck Laboratory for High-Throughput Experimentation Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia PA USA
| |
Collapse
|
10
|
Das A, Chatani N. Rh(I)-catalysed imine-directed C-H functionalization via the oxidative [3 + 2] cycloaddition of benzylamine derivatives with maleimides. Chem Commun (Camb) 2022; 58:1123-1126. [PMID: 34981093 DOI: 10.1039/d1cc06622f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The Rh(I)-catalysed imine-directed oxidative [3 + 2] cycloaddition of benzylamines with maleimides is reported. A wide range of both benzylamines and maleimides is applicable to the reaction. A one-pot three component strategy using benzylamines, 2-pyridinecarboxaldehyde, and maleimides is successfully achieved. Mechanistic studies including deuterium labelling experiments suggest that a zwitterionic intermediate is formed and is a key intermediate through the Rh-catalysed activation of a benzylic C(sp3)-H bond of the imine.
Collapse
Affiliation(s)
- Amrita Das
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan.
| | - Naoto Chatani
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan.
| |
Collapse
|
11
|
Hu Y, Wang C, Zhu H, Xing J, Dou X. Rhodium‐Catalysed Asymmetric Arylation of Pyridylimines. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202101281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Yan Hu
- Department of Chemistry, School of Science China Pharmaceutical University Nanjing 211198 People's Republic of China
| | - Chenhong Wang
- Department of Chemistry, School of Science China Pharmaceutical University Nanjing 211198 People's Republic of China
| | - Huilong Zhu
- Department of Chemistry, School of Science China Pharmaceutical University Nanjing 211198 People's Republic of China
| | - Junhao Xing
- Department of Chemistry, School of Science China Pharmaceutical University Nanjing 211198 People's Republic of China
| | - Xiaowei Dou
- Department of Chemistry, School of Science China Pharmaceutical University Nanjing 211198 People's Republic of China
| |
Collapse
|
12
|
Shelp R, Merchant RR, Hughes JME, Walsh PJ. Enantioenriched BCP Benzylamine Synthesis via Metal Hydride Hydrogen Atom Transfer/Sulfinimine Addition to [1.1.1]Propellane. Org Lett 2021; 24:110-114. [PMID: 34908426 DOI: 10.1021/acs.orglett.1c03681] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The stereoselective synthesis of bicyclo[1.1.1]pentane (BCP) benzylamine derivatives from [1.1.1]propellane and mesityl sulfinimines via metal hydride hydrogen atom transfer (MH HAT) is reported. Medicinally relevant heterocyclic BCP methanamines are prepared with high diastereoselectivity. The strategic impact of the method is demonstrated via the streamlined synthesis of the BCP analogue of a key levocetirizine intermediate. Mechanistic evidence for a competitive H2 evolution pathway and the importance of controlled silane addition during reaction initiation are disclosed.
Collapse
Affiliation(s)
- Russell Shelp
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Rohan R Merchant
- Department of Discovery Chemistry, Merck & Co., Inc., South San Francisco, California 94080, United States
| | - Jonathan M E Hughes
- Department of Process Research and Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Patrick J Walsh
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| |
Collapse
|
13
|
Zou D, Gan L, Yang F, Wang H, Pu Y, Li J, Walsh PJ. SET activation of nitroarenes by 2-azaallyl anions as a straightforward access to 2,5-dihydro-1,2,4-oxadiazoles. Nat Commun 2021; 12:7060. [PMID: 34862375 PMCID: PMC8642414 DOI: 10.1038/s41467-021-26767-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Accepted: 10/07/2021] [Indexed: 11/24/2022] Open
Abstract
The use of nitroarenes as amino sources in synthesis is challenging. Herein is reported an unusual, straightforward, and transition metal-free method for the net [3 + 2]-cycloaddition reaction of 2-azaallyl anions with nitroarenes. The products of this reaction are diverse 2,5-dihydro-1,2,4-oxadiazoles (>40 examples, up to 95% yield). This method does not require an external reductant to reduce nitroarenes, nor does it employ nitrosoarenes, which are often used in N-O cycloadditions. Instead, it is proposed that the 2-azaallyl anions, which behave as super electron donors (SEDs), deliver an electron to the nitroarene to generate a nitroarene radical anion. A downstream 2-azaallyl radical coupling with a newly formed nitrosoarene is followed by ring closure to afford the observed products. This proposed reaction pathway is supported by computational studies and experimental evidence. Overall, this method uses readily available materials, is green, and exhibits a broad scope.
Collapse
Affiliation(s)
- Dong Zou
- grid.13402.340000 0004 1759 700XDepartment of Pharmacy, School of Medicine, Zhejiang University City College, No. 48, Huzhou Road, 310015 Hangzhou, P. R. China
| | - Lishe Gan
- grid.500400.10000 0001 2375 7370School of Biotechnology and Health Sciences, Wuyi University, 529020 Jiangmen, P. R. China
| | - Fan Yang
- grid.13402.340000 0004 1759 700XDepartment of Pharmacy, School of Medicine, Zhejiang University City College, No. 48, Huzhou Road, 310015 Hangzhou, P. R. China
| | - Huan Wang
- grid.13402.340000 0004 1759 700XDepartment of Pharmacy, School of Medicine, Zhejiang University City College, No. 48, Huzhou Road, 310015 Hangzhou, P. R. China
| | - Youge Pu
- grid.25879.310000 0004 1936 8972Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, PA 19104-6323 USA
| | - Jie Li
- Department of Pharmacy, School of Medicine, Zhejiang University City College, No. 48, Huzhou Road, 310015, Hangzhou, P. R. China.
| | - Patrick J. Walsh
- grid.25879.310000 0004 1936 8972Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, PA 19104-6323 USA
| |
Collapse
|
14
|
Nambo M, Crudden CM. Transition Metal-Catalyzed Cross-Couplings of Benzylic Sulfone Derivatives. CHEM REC 2021; 21:3978-3989. [PMID: 34523788 DOI: 10.1002/tcr.202100210] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 08/31/2021] [Accepted: 09/01/2021] [Indexed: 12/25/2022]
Abstract
In recent years, the use of organosulfones as a new class of cross-coupling partner in transition-metal catalyzed reactions has undergone significant advancement. In this personal account, our recent investigations into desulfonylative cross-coupling reactions of benzylic sulfone derivatives catalyzed by Pd, Ni, and Cu catalysis is described. Combined with the facile α-functionalizations of sulfones, our methods can be used to form valuable multiply-arylated structures such as di-, tri-, and, tetraarylmethanes from readily available substrates. The reactivity of sulfones can be increased by introducing electron-withdrawing substituents such as 3,5-bis(trifluoromethyl)phenyl and trifluoromethyl groups, which enable more challenging cross-coupling reactions. Reactive intermediates including Cu-carbene complexes were identified as key intermediates in sulfone activation, representing new types of C-SO2 bond activation processes. These results indicate sulfones are powerful functional groups, enabling new catalytic desulfonylative transformations.
Collapse
Affiliation(s)
- Masakazu Nambo
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Chikusa, Nagoya, 464-860, Japan
| | - Cathleen M Crudden
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Chikusa, Nagoya, 464-860, Japan.,Department of Chemistry, Queen's University, Chernoff Hall, Kingston, Ontario, K7L 3N6, Canada
| |
Collapse
|
15
|
Deng G, Duan S, Wang J, Chen Z, Liu T, Chen W, Zhang H, Yang X, Walsh PJ. Transition-metal-free allylation of 2-azaallyls with allyl ethers through polar and radical mechanisms. Nat Commun 2021; 12:3860. [PMID: 34162867 PMCID: PMC8222226 DOI: 10.1038/s41467-021-24027-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Accepted: 05/26/2021] [Indexed: 12/14/2022] Open
Abstract
Allylation of nucleophiles with highly reactive electrophiles like allyl halides can be conducted without metal catalysts. Less reactive electrophiles, such as allyl esters and carbonates, usually require a transition metal catalyst to facilitate the allylation. Herein, we report a unique transition-metal-free allylation strategy with allyl ether electrophiles. Reaction of a host of allyl ethers with 2-azaallyl anions delivers valuable homoallylic amine derivatives (up to 92%), which are significant in the pharmaceutical industry. Interestingly, no deprotonative isomerization or cyclization of the products were observed. The potential synthetic utility and ease of operation is demonstrated by a gram scale telescoped preparation of a homoallylic amine. In addition, mechanistic studies provide insight into these C(sp3)-C(sp3) bond-forming reactions.
Collapse
Affiliation(s)
- Guogang Deng
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education; Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, P. R. China
| | - Shengzu Duan
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education; Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, P. R. China
| | - Jing Wang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education; Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, P. R. China
| | - Zhuo Chen
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education; Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, P. R. China
| | - Tongqi Liu
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education; Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, P. R. China
| | - Wen Chen
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education; Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, P. R. China
| | - Hongbin Zhang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education; Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, P. R. China.
| | - Xiaodong Yang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education; Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, P. R. China.
| | - Patrick J Walsh
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry, University of Pennsylvania, Philadelphia, PA, USA.
| |
Collapse
|
16
|
Wan LQ, Cao JG, Niu D, Zhang X. Cobalt-Catalyzed Umpolung Alkylation of Imines To Generate α-Branched Aliphatic Amines. Org Lett 2021; 23:3818-3822. [PMID: 33974795 DOI: 10.1021/acs.orglett.1c00835] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Here we report a general and mild approach to prepare α-branched aliphatic amines from imines. This method capitalizes on a cobalt-catalyzed umpolung alkylation of imines, employs easily available reaction partners, and demonstrates a broad substrate scope. Mechanistic studies suggest this transformation occurs by a radical pathway.
Collapse
Affiliation(s)
- Li-Qiang Wan
- Department of Emergency, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, and School of Chemical Engineering, Sichuan University, Chengdu, 610041, China
| | - Jin-Ge Cao
- Department of Emergency, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, and School of Chemical Engineering, Sichuan University, Chengdu, 610041, China
| | - Dawen Niu
- Department of Emergency, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, and School of Chemical Engineering, Sichuan University, Chengdu, 610041, China
| | - Xia Zhang
- Department of Emergency, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, and School of Chemical Engineering, Sichuan University, Chengdu, 610041, China
| |
Collapse
|
17
|
Pu J, Chen B, Wu W, Yang C, Zhang G, Chruma JJ. Design and Synthesis of Fluorescent 1,3-Diaryl-β-carbolines and 1,3-Diaryl-3,4-dihydro-β-carbolines. ACS OMEGA 2021; 6:12238-12249. [PMID: 34250327 PMCID: PMC8260278 DOI: 10.1021/acsomega.1c01116] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 04/22/2021] [Indexed: 05/09/2023]
Abstract
The 1,3-diaryl-β-carboline derivatives, including 3,4-dihydro variants, were synthesized via a multiple-step approach. These compounds possess rigid and twisted configurations, which are expected to exhibit unique optical properties. The absorption and fluorescence properties of the newly synthesized compounds were investigated. These synthetic 1,3-diaryl-β-carbolines displayed strong emission in the range of 387-409 nm and exhibited absolute photoluminescence quantum yields of up to 74%. Density functional theory calculations were performed to better elucidate the geometric, electronic, and optical properties of these novel 1,3-diaryl-β-carbolines.
Collapse
Affiliation(s)
- JiYang Pu
- Key
Laboratory of Green Chemistry & Technology, College of Chemistry,
State Key Laboratory of Biotherapy and Healthy Food Evaluation Research
Center, and Sino-British Materials Research Institute, College of
Physical Sciences & Technology, Sichuan
University, Chengdu, Sichuan 610064, P. R. China
| | - Biao Chen
- Hefei
National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, 96 Jinzhai Rd, Hefei, Anhui 230026, P. R. China
| | - Wanhua Wu
- Key
Laboratory of Green Chemistry & Technology, College of Chemistry,
State Key Laboratory of Biotherapy and Healthy Food Evaluation Research
Center, and Sino-British Materials Research Institute, College of
Physical Sciences & Technology, Sichuan
University, Chengdu, Sichuan 610064, P. R. China
| | - Cheng Yang
- Key
Laboratory of Green Chemistry & Technology, College of Chemistry,
State Key Laboratory of Biotherapy and Healthy Food Evaluation Research
Center, and Sino-British Materials Research Institute, College of
Physical Sciences & Technology, Sichuan
University, Chengdu, Sichuan 610064, P. R. China
| | - Guoqing Zhang
- Hefei
National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, 96 Jinzhai Rd, Hefei, Anhui 230026, P. R. China
| | - Jason J. Chruma
- Key
Laboratory of Green Chemistry & Technology, College of Chemistry,
State Key Laboratory of Biotherapy and Healthy Food Evaluation Research
Center, and Sino-British Materials Research Institute, College of
Physical Sciences & Technology, Sichuan
University, Chengdu, Sichuan 610064, P. R. China
- Department
of Chemistry, University of Virginia, McCormick Road, P.O. Box 400319, Charlottesville, Virginia 22903-4319, United States
- ; . Tel.: +1434−982-3082
| |
Collapse
|
18
|
Lin T, Qian P, Wang YE, Ou M, Jiang L, Zhu C, Xu Y, Xiong D, Mao J. Palladium-Catalyzed Direct Arylation of 2-Pyridylmethyl Silanes with Aryl Bromides. Org Lett 2021; 23:3000-3003. [PMID: 33779175 DOI: 10.1021/acs.orglett.1c00677] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The first palladium-catalyzed direct arylation of 2-pyridylmethyl silanes with aryl bromides to generate a diverse array of aryl(2-pyridyl)-methyl silane derivatives has been developed. This protocol facilitates access to various kinds of heterocycle-containing silanes in good to excellent yields (40 examples, 66-97% yield) with good functional group tolerance. The scalability of this transformation is demonstrated.
Collapse
Affiliation(s)
- Tingzhi Lin
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211800, P. R. China
| | - Pengcheng Qian
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211800, P. R. China
| | - Yan-En Wang
- College of Science, Hebei Agricultural University, Baoding 071000, P. R. China
| | - Mingjie Ou
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211800, P. R. China
| | - Long Jiang
- Institute of Advanced Synthesis (IAS), Northwestern Polytechnical University (NPU), Xi'an 710072, China.,Yangtze River Delta Research Institute of NPU, Taicang, Jiangsu 215400, P. R. China
| | - Chen Zhu
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211800, P. R. China
| | - Yuchuan Xu
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211800, P. R. China
| | - Dan Xiong
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211800, P. R. China
| | - Jianyou Mao
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211800, P. R. China
| |
Collapse
|
19
|
Shelp RA, Ciro A, Pu Y, Merchant RR, Hughes JME, Walsh PJ. Strain-release 2-azaallyl anion addition/borylation of [1.1.1]propellane: synthesis and functionalization of benzylamine bicyclo[1.1.1]pentyl boronates. Chem Sci 2021; 12:7066-7072. [PMID: 34123334 PMCID: PMC8153217 DOI: 10.1039/d1sc01349a] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Accepted: 04/12/2021] [Indexed: 12/27/2022] Open
Abstract
We report a 3-component reaction between N-benzyl ketimines, [1.1.1]propellane, and pinacol boronates to generate benzylamine bicyclo[1.1.1]pentane (BCP) pinacol boronates. These structures are analogous to highly sought diarylmethanamine cores, which are common motifs in bioactive molecules. We demonstrate the versatility of the boronate ester handle via downstream functionalization through a variety of reactions, including a challenging Pd-catalyzed (hetero)arylation that exhibits a broad substrate scope. Together, these methods enable the synthesis of high-value BCP benzylamines which are inaccessible by existing methods. Furthermore, we demonstrate the successful application of these newly developed (hetero)arylation conditions to a variety of challenging tertiary pinacol boronates, including nitrogen-containing heterocycles, 1,1-disubstituted cyclopropanes, and other BCP cores.
Collapse
Affiliation(s)
- Russell A Shelp
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia PA USA
| | - Anthony Ciro
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia PA USA
| | - Youge Pu
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia PA USA
| | - Rohan R Merchant
- Department of Discovery Chemistry, Merck & Co., Inc. South San Francisco California 94080 USA
| | - Jonathan M E Hughes
- Department of Process Research and Development, Merck & Co., Inc. Rahway New Jersey 07065 USA
| | - Patrick J Walsh
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia PA USA
| |
Collapse
|
20
|
Duan S, Deng G, Zi Y, Wu X, Tian X, Liu Z, Li M, Zhang H, Yang X, Walsh PJ. Nickel-catalyzed enantioselective vinylation of aryl 2-azaallyl anions. Chem Sci 2021; 12:6406-6412. [PMID: 34084440 PMCID: PMC8115067 DOI: 10.1039/d1sc00972a] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
A unique enantioselective nickel-catalyzed vinylation of 2-azaallyl anions is advanced for the first time. This method affords diverse vinyl aryl methyl amines with high enantioselectivities, which are frequently occurring scaffolds in natural products and medications. This C-H functionalization method can also be extended to the synthesis of enantioenriched 1,3-diamine derivatives by employing suitably elaborated vinyl bromides. Key to the success of this process is the identification of a Ni/chiraphos catalyst system and a less reducing 2-azaallyl anion, all of which favor an anionic vinylation route over a background radical reaction. A telescoped gram scale synthesis and a product derivatization study confirmed the scalability and synthetic potential of this method.
Collapse
Affiliation(s)
- Shengzu Duan
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University Kunming 650091 P. R. China
| | - Guogang Deng
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University Kunming 650091 P. R. China
| | - Yujin Zi
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University Kunming 650091 P. R. China
| | - Xiaomei Wu
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University Kunming 650091 P. R. China
| | - Xun Tian
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University Kunming 650091 P. R. China
| | - Zhengfen Liu
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University Kunming 650091 P. R. China
| | - Minyan Li
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia PA USA
| | - Hongbin Zhang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University Kunming 650091 P. R. China
| | - Xiaodong Yang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University Kunming 650091 P. R. China
| | - Patrick J Walsh
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia PA USA
| |
Collapse
|
21
|
Mou ZD, Zhang X, Niu D. Catalytic asymmetric umpolung reaction of imines to synthesize isoindolinones and tetrahydroisoquinolines. GREEN SYNTHESIS AND CATALYSIS 2021. [DOI: 10.1016/j.gresc.2021.01.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
|
22
|
Wang W, Xiong Q, Gong L, Wang Y, Liu J, Lan Y, Zhang X. Regio- and Enantioselective Palladium-Catalyzed Asymmetric Allylation of N-Fluorenyl Trifluoromethyl Imine. Org Lett 2020; 22:5479-5485. [PMID: 32602723 DOI: 10.1021/acs.orglett.0c01836] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A palladium-catalyzed asymmetric allylation of N-fluorenyl trifluoromethyl imine with allylic acetates is disclosed. This method provides scalable and efficient access to polysubstituted chiral α-trifluoromethyl amines bearing two adjacent stereocenters and one allyl group in high yields with excellent regio-, diastereo-, and enantioselectivity. Importantly, this method also provides a powerful strategy for the synthesis of both regioisomeric products and the regioselectivity is controlled by the chiral catalysts and optically active substrates.
Collapse
Affiliation(s)
- Wei Wang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu 610041, P.R. China.,Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province/College of Chemistry & Chemical Engineering, China West Normal University, Nanchong 637009, P.R. China
| | - Qin Xiong
- College of Chemistry, and Institute of Green Catalysis, Zhengzhou University, Zhengzhou 450001, P.R. China.,School of Chemistry and Chemical Engineering, and Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 400030, P.R. China
| | - Liang Gong
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu 610041, P.R. China
| | - Yingwei Wang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu 610041, P.R. China
| | - Jie Liu
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu 610041, P.R. China
| | - Yu Lan
- College of Chemistry, and Institute of Green Catalysis, Zhengzhou University, Zhengzhou 450001, P.R. China.,School of Chemistry and Chemical Engineering, and Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 400030, P.R. China
| | - Xia Zhang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu 610041, P.R. China
| |
Collapse
|
23
|
Huang Y, Wang L, Li J, Qiu H, Leung PH. Enantioselective C,P-Palladacycle-Catalyzed Arylation of Imines. ACS OMEGA 2020; 5:15936-15941. [PMID: 32656414 PMCID: PMC7345393 DOI: 10.1021/acsomega.0c01124] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 06/08/2020] [Indexed: 06/11/2023]
Abstract
Chiral diarylmethylamines are of great interest because of their prevalence in biological and pharmaceutical sciences. Herein, we report a C,P-palladacycle-catalyzed enantioselective synthesis of chiral diarylmethylamines via asymmetric arylation of N-protected imines with arylboronic acids. The C,P-palladacycle showed high reactivity (up to 99% yield) and enantioselectivity (up to 99% ee) toward this arylation, enabling the tolerance of a wide range of functionalities, providing a convenient and efficient access to enantiomerically enriched diarylmethylamines. The absolute configuration of the product was well rationalized by the proposed stereochemical pathway and the catalytical cycle.
Collapse
Affiliation(s)
- Yinhua Huang
- College
of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China
| | - Lijun Wang
- College
of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China
| | - Junbao Li
- College
of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China
| | - Huayu Qiu
- College
of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China
| | - Pak-Hing Leung
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
| |
Collapse
|
24
|
Nagaraju K, Gurubrahamam R, Chen K. Organocatalytic Diastereoselective Synthesis of Diazoaryl-benzo[b]azepine Derivatives. J Org Chem 2020; 85:7060-7067. [DOI: 10.1021/acs.joc.0c00431] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Koppanathi Nagaraju
- Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan, ROC
| | - Ramani Gurubrahamam
- Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan, ROC
- Department of Chemistry, Indian Institute of Technology Jammu, Jagti, NH 44, Jammu (J&K) 181221, India
| | - Kwunmin Chen
- Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan, ROC
| |
Collapse
|
25
|
Lefebvre Q, Porta R, Millet A, Jia J, Rueping M. One Amine-3 Tasks: Reductive Coupling of Imines with Olefins in Batch and Flow. Chemistry 2020; 26:1363-1367. [PMID: 31777987 PMCID: PMC7027816 DOI: 10.1002/chem.201904483] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Indexed: 11/05/2022]
Abstract
Owing to their wide range of biological properties, γ-aminobutyric acid derivatives (GABA) have been extensively studied and found noteworthy industrial applications. However, atom-economical and efficient processes for their production are scarce and would greatly benefit from further investigations. Herein, we demonstrate that an iridium-based photocatalyst promotes the direct reductive cross-coupling of imines with olefins upon irradiation with visible light to give GABA derivatives in good yields and selectivities. We also stress the enabling triple role of tributylamine additive in this process, discuss the advantages of strategies based on proton-coupled electron transfer (PCET) and demonstrate the scale-up of this reaction in continuous flow.
Collapse
Affiliation(s)
- Quentin Lefebvre
- Institut of Organic ChemistryRWTH AachenLandoltweg 152074AachenGermany
| | - Riccardo Porta
- Institut of Organic ChemistryRWTH AachenLandoltweg 152074AachenGermany
- Dipartimento di ChimicaUniversità degli Studi di MilanoVia Golgi 1920133MilanoItaly
| | - Anthony Millet
- Institut of Organic ChemistryRWTH AachenLandoltweg 152074AachenGermany
| | - Jiaqi Jia
- Institut of Organic ChemistryRWTH AachenLandoltweg 152074AachenGermany
| | - Magnus Rueping
- Institut of Organic ChemistryRWTH AachenLandoltweg 152074AachenGermany
- King Abdullah University of Science and Technology (KAUST)KAUST Catalysis Center (KCC)Thuwal23955-6900Saudi Arabia
| |
Collapse
|
26
|
Yang JL, Ma YH, Li YH, Zhang YP, Tian HC, Huang YC, Li Y, Chen W, Yang LJ. Design, Synthesis, and Anticancer Activity of Novel Trimethoxyphenyl-Derived Chalcone-Benzimidazolium Salts. ACS OMEGA 2019; 4:20381-20393. [PMID: 31815242 PMCID: PMC6894157 DOI: 10.1021/acsomega.9b03077] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Accepted: 11/06/2019] [Indexed: 05/05/2023]
Abstract
A series of novel trimethoxyphenyl-derived chalcone-benzimidazolium salts were synthesized. The biological properties of the compounds were screened in vitro against five different human tumor cell lines. The results suggest that the 5,6-dimethyl-benzimidazole or 2-methyl-benzimidazole ring as well as the 2-naphthylmethyl, 4-methylbenzyl, or 2-naphthylacyl substituent at position-3 of the benzimidazole ring was important to the cytotoxic activity. Notably, (E)-5,6-dimethyl-3-(naphthalen-2-ylmethyl)-1-(3-(4-(3-(3,4,5-trimethoxyphenyl)acryloyl)phenoxy)propyl)-1H-benzo[d]imidazol-3-ium bromide (7f) was more selective to HL-60, MCF-7, and SW-480 cell lines with IC50 values 8.0-, 11.1-, and 5.8-fold lower than DDP. Studies of the antitumor mechanism of action showed that compound 7f could induce cell-cycle G1 phase arrest and apoptosis in SMMC-7721 cells.
Collapse
Affiliation(s)
- Jun-Li Yang
- Key
Laboratory of Medicinal Chemistry for Natural Resources, Ministry
of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming 650091, P. R. China
- School
of Chemistry & Environment, Engineering Research Center for Green
Preparation Technology of Biobased Materials, Yunnan Minzu University, Kunming 650500, P. R. China
| | - Yong-Hui Ma
- Key
Laboratory of Medicinal Chemistry for Natural Resources, Ministry
of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming 650091, P. R. China
| | - Yan-Hua Li
- School
of Chemistry & Environment, Engineering Research Center for Green
Preparation Technology of Biobased Materials, Yunnan Minzu University, Kunming 650500, P. R. China
| | - Yi-Peng Zhang
- Key
Laboratory of Medicinal Chemistry for Natural Resources, Ministry
of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming 650091, P. R. China
| | - Hong-Chang Tian
- Key
Laboratory of Medicinal Chemistry for Natural Resources, Ministry
of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming 650091, P. R. China
| | - Yuan-Cheng Huang
- Key
Laboratory of Medicinal Chemistry for Natural Resources, Ministry
of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming 650091, P. R. China
| | - Yan Li
- State
Key Laboratory for Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Science, Kunming 650204, P. R. China
| | - Wen Chen
- Key
Laboratory of Medicinal Chemistry for Natural Resources, Ministry
of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming 650091, P. R. China
- E-mail: (W.C.)
| | - Li-Juan Yang
- School
of Chemistry & Environment, Engineering Research Center for Green
Preparation Technology of Biobased Materials, Yunnan Minzu University, Kunming 650500, P. R. China
- E-mail: (L.-J.Y.)
| |
Collapse
|
27
|
Wang Y, Deng LF, Zhang X, Niu D. Catalytic Asymmetric Synthesis of α-Tetrasubstituted α-Trifluoromethyl Homoallylic Amines by Ir-Catalyzed Umpolung Allylation of Imines. Org Lett 2019; 21:6951-6956. [PMID: 31418581 DOI: 10.1021/acs.orglett.9b02550] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Yingwei Wang
- Department of Emergency, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, and School of Chemical Engineering, Sichuan University, Chengdu, 610041, China
| | - Li-Fan Deng
- Department of Emergency, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, and School of Chemical Engineering, Sichuan University, Chengdu, 610041, China
| | - Xia Zhang
- Department of Emergency, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, and School of Chemical Engineering, Sichuan University, Chengdu, 610041, China
| | - Dawen Niu
- Department of Emergency, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, and School of Chemical Engineering, Sichuan University, Chengdu, 610041, China
| |
Collapse
|
28
|
Malcolmson SJ, Li K, Shao X. 2-Azadienes as Enamine Umpolung Synthons for the Preparation of Chiral Amines. Synlett 2019; 30:1253-1268. [PMID: 33731976 PMCID: PMC7963344 DOI: 10.1055/s-0037-1611770] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The development of new strategies for the preparation of chiral amines is an important objective in organic synthesis. In this Synpacts, we summarize our approach for catalytically accessing nucleophilic aminoalkyl metal species from 2-azadienes, and its application in generating a number of important but elusive chiral amine scaffolds. Reductive couplings with ketones and imines afford 1,2-amino tertiary alcohols and 1,2-diamines, respectively, whereas fluoroarylations of gem-difluoro-2-azadienes deliver α-trifluoromethylated benzylic amines.
Collapse
Affiliation(s)
| | - Kangnan Li
- Department of Chemistry, Duke University, NC 27708, USA
| | - Xinxin Shao
- Department of Chemistry, Duke University, NC 27708, USA
| |
Collapse
|
29
|
Li Z, Zhang L, Nishiura M, Hou Z. Copper-Catalyzed Umpolung of Imines through Carbon-to-Nitrogen Boryl Migration. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00777] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Zhenghua Li
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Liang Zhang
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Masayoshi Nishiura
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Zhaomin Hou
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| |
Collapse
|
30
|
Nambo M, Tahara Y, Yim JC, Crudden CM. Cu‐Catalyzed Desulfonylative Amination of Benzhydryl Sulfones. Chemistry 2019; 25:1923-1926. [PMID: 30450672 DOI: 10.1002/chem.201805638] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Masakazu Nambo
- Institute of Transformative Bio-Molecules (WPI-ITbM)Nagoya University Chikusa Nagoya 464–8602 Japan
| | - Yasuyo Tahara
- Institute of Transformative Bio-Molecules (WPI-ITbM)Nagoya University Chikusa Nagoya 464–8602 Japan
| | - Jacky C.‐H. Yim
- Institute of Transformative Bio-Molecules (WPI-ITbM)Nagoya University Chikusa Nagoya 464–8602 Japan
| | - Cathleen M. Crudden
- Institute of Transformative Bio-Molecules (WPI-ITbM)Nagoya University Chikusa Nagoya 464–8602 Japan
- Department of ChemistryQueen's University Chernoff Hall Kingston Ontario K7L 3N6 Canada
| |
Collapse
|
31
|
Daniel PE, Onyeagusi CI, Ribeiro AA, Li K, Malcolmson SJ. Palladium-Catalyzed Synthesis of α-Trifluoromethyl Benzylic Amines via Fluoroarylation of gem-Difluoro-2-azadienes Enabled by Phosphine-Catalyzed Formation of an Azaallyl-Silver Intermediate. ACS Catal 2019; 9:205-210. [PMID: 31105988 DOI: 10.1021/acscatal.8b03999] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We report the synthesis of α-trifluoromethyl benzylic amines through the vicinal fluoroarylation of gem-difluoro-2-azadienes. Our studies indicate that XPhos plays an important role as a phase transfer catalyst that promotes the addition of AgF to the difluoroazadiene, generating an α-trifluoromethyl azaallyl-silver intermediate that we have characterized by NMR spectroscopy. This intermediate likely transmetallates to Pd, coupling several aryl iodides to deliver products in up to 90% yield. Modification of the azadiene's activating group facilitates challenging cross-couplings.
Collapse
Affiliation(s)
- Paige E. Daniel
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Chibueze I. Onyeagusi
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Anthony A. Ribeiro
- Duke University NMR Center and Department of Radiology, Duke University, Durham, North Carolina 27710, United States
| | - Kangnan Li
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Steven J. Malcolmson
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| |
Collapse
|
32
|
Wang R, Ma M, Gong X, Fan X, Walsh PJ. Reductive Cross-Coupling of Aldehydes and Imines Mediated by Visible Light Photoredox Catalysis. Org Lett 2018; 21:27-31. [DOI: 10.1021/acs.orglett.8b03394] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Rui Wang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Mengyue Ma
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Xu Gong
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Xinyuan Fan
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Patrick J. Walsh
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| |
Collapse
|
33
|
Tang S, Zhang X, Sun J, Niu D, Chruma JJ. 2-Azaallyl Anions, 2-Azaallyl Cations, 2-Azaallyl Radicals, and Azomethine Ylides. Chem Rev 2018; 118:10393-10457. [PMID: 30302999 DOI: 10.1021/acs.chemrev.8b00349] [Citation(s) in RCA: 164] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
This review covers the use of 2-azaallyl anions, 2-azaallyl cations, and 2-azaallyl radicals in organic synthesis up through June 2018. Particular attention is paid to both foundational studies and recent advances over the past decade involving semistabilized and nonstabilized 2-azaallyl anions as key intermediates in various carbon-carbon and carbon-heteroatom bond-forming processes. Both transition-metal-catalyzed and transition-metal-free transformations are covered. Azomethine ylides, which have received significant attention elsewhere, are discussed briefly with the primary focus on critical comparisons with 2-azaallyl anions in regard to generation and use.
Collapse
Affiliation(s)
- Shaojian Tang
- Key Laboratory of Green Chemistry & Technology (MOE), College of Chemistry, Sino-British Materials Research Institute, College of Physical Sciences & Technology, and State Key Laboratory of Biotherapy, West China Hospital , Sichuan University , Chengdu , Sichuan 610064 , People's Republic of China
| | - Xia Zhang
- Key Laboratory of Green Chemistry & Technology (MOE), College of Chemistry, Sino-British Materials Research Institute, College of Physical Sciences & Technology, and State Key Laboratory of Biotherapy, West China Hospital , Sichuan University , Chengdu , Sichuan 610064 , People's Republic of China
| | - Jiayue Sun
- Key Laboratory of Green Chemistry & Technology (MOE), College of Chemistry, Sino-British Materials Research Institute, College of Physical Sciences & Technology, and State Key Laboratory of Biotherapy, West China Hospital , Sichuan University , Chengdu , Sichuan 610064 , People's Republic of China
| | - Dawen Niu
- Key Laboratory of Green Chemistry & Technology (MOE), College of Chemistry, Sino-British Materials Research Institute, College of Physical Sciences & Technology, and State Key Laboratory of Biotherapy, West China Hospital , Sichuan University , Chengdu , Sichuan 610064 , People's Republic of China
| | - Jason J Chruma
- Key Laboratory of Green Chemistry & Technology (MOE), College of Chemistry, Sino-British Materials Research Institute, College of Physical Sciences & Technology, and State Key Laboratory of Biotherapy, West China Hospital , Sichuan University , Chengdu , Sichuan 610064 , People's Republic of China
| |
Collapse
|
34
|
Lei Y, Yang J, Qi R, Wang S, Wang R, Xu Z. Arylation of benzyl amines with aromatic nitriles. Chem Commun (Camb) 2018; 54:11881-11884. [PMID: 30283923 DOI: 10.1039/c8cc06408c] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
In the past years, the activations of aromatic nitriles for radical arylations under photoirradiation have been developed. We here report the first example of radical arylations using aromatic nitriles without the assistance of photoirradiation. Importantly, with this method, the direct arylation of C(sp3)-H in benzyl amines provided a practical method for the synthesis of diarylmethylamines without the use of precious transition metal catalysts.
Collapse
Affiliation(s)
- Yingjie Lei
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, The Institute of Pharmacology, School of Basic Medical Sciences, Lanzhou University, 199 West Donggang Road, Lanzhou 730000, China.
| | - Ju Yang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, The Institute of Pharmacology, School of Basic Medical Sciences, Lanzhou University, 199 West Donggang Road, Lanzhou 730000, China.
| | - Rupeng Qi
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, The Institute of Pharmacology, School of Basic Medical Sciences, Lanzhou University, 199 West Donggang Road, Lanzhou 730000, China.
| | - Shan Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, The Institute of Pharmacology, School of Basic Medical Sciences, Lanzhou University, 199 West Donggang Road, Lanzhou 730000, China.
| | - Rui Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, The Institute of Pharmacology, School of Basic Medical Sciences, Lanzhou University, 199 West Donggang Road, Lanzhou 730000, China.
| | - Zhaoqing Xu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, The Institute of Pharmacology, School of Basic Medical Sciences, Lanzhou University, 199 West Donggang Road, Lanzhou 730000, China.
| |
Collapse
|
35
|
Abstract
An intramolecular umpolung allylation of imines is reported. This reaction occurs via the intermediacy of 2-azaallyl anions. It could proceed either under transition-metal-catalyzed conditions or under transition-metal-free conditions. Importantly, this approach afforded trans-3-vinyl-4-aminochromanes with high diastereoselectivity, while conventional, nonumpolung methods often display high cis-selectivity.
Collapse
Affiliation(s)
- Miao Zhan
- Department of Emergency, State Key Laboratory of Biotherapy, West China Hospital , Sichuan University, and Collaborative Innovation Center for Biotherapy , Chengdu 610041 , China
| | - Xiang Pu
- Department of Emergency, State Key Laboratory of Biotherapy, West China Hospital , Sichuan University, and Collaborative Innovation Center for Biotherapy , Chengdu 610041 , China
| | - Bin He
- Department of Emergency, State Key Laboratory of Biotherapy, West China Hospital , Sichuan University, and Collaborative Innovation Center for Biotherapy , Chengdu 610041 , China
| | - Dawen Niu
- Department of Emergency, State Key Laboratory of Biotherapy, West China Hospital , Sichuan University, and Collaborative Innovation Center for Biotherapy , Chengdu 610041 , China
| | - Xia Zhang
- Department of Emergency, State Key Laboratory of Biotherapy, West China Hospital , Sichuan University, and Collaborative Innovation Center for Biotherapy , Chengdu 610041 , China
| |
Collapse
|
36
|
Reddy LR, Kotturi S, Shenoy R, Nalivela KS, Patel C, Raval P, Zalavadiya V. Umpolung Synthesis of Vicinal Diamines: Diastereoselective Addition of 2-Azaallyl Anions to Davis-Ellman's Imines. Org Lett 2018; 20:5423-5426. [PMID: 30112909 DOI: 10.1021/acs.orglett.8b02331] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A highly regioselective and diastereoselective addition of 2-azaallyl anions to N- tert-butanesulfinylimines is reported. This methodology affords the preparation of enantiomerically and diastereomerically pure vicinal diamines bearing two adjacent stereocenters. Reactions proceed efficiently (yield up to 94%), diastereoselectively ( dr values up to 98:2:0:0), and site-selectively to deliver products with differentiated amino groups.
Collapse
Affiliation(s)
- Leleti Rajender Reddy
- Piramal Discovery Solutions , Pharmaceutical Special Economic Zone , Sarkhej Bavla Highway , Ahmedabad , Gujarat 382213 , India
| | - Sharadsrikar Kotturi
- Piramal Discovery Solutions , Pharmaceutical Special Economic Zone , Sarkhej Bavla Highway , Ahmedabad , Gujarat 382213 , India
| | - Rajesh Shenoy
- Piramal Discovery Solutions , Pharmaceutical Special Economic Zone , Sarkhej Bavla Highway , Ahmedabad , Gujarat 382213 , India
| | - Kumara Swamy Nalivela
- Piramal Discovery Solutions , Pharmaceutical Special Economic Zone , Sarkhej Bavla Highway , Ahmedabad , Gujarat 382213 , India
| | - Chirag Patel
- Piramal Discovery Solutions , Pharmaceutical Special Economic Zone , Sarkhej Bavla Highway , Ahmedabad , Gujarat 382213 , India
| | - Poojabahen Raval
- Piramal Discovery Solutions , Pharmaceutical Special Economic Zone , Sarkhej Bavla Highway , Ahmedabad , Gujarat 382213 , India
| | - Vinkal Zalavadiya
- Piramal Discovery Solutions , Pharmaceutical Special Economic Zone , Sarkhej Bavla Highway , Ahmedabad , Gujarat 382213 , India
| |
Collapse
|
37
|
Wang Q, Poznik M, Li M, Walsh PJ, Chruma JJ. 2‐Azaallyl Anions as Light‐Tunable Super‐Electron‐Donors: Coupling with Aryl Fluorides, Chlorides, and Bromides. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800396] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Qianmei Wang
- Key Laboratory of Green Chemistry & Technology, College of Chemistry and Sino-British Materials Research Institute, College of Physical Science & Technology Sichuan University Chengdu, Sichuan 610064 People's Republic of China
| | - Michal Poznik
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry University of Pennsylvania 231 South 34th Street Philadelphia, Pennsylvania 19104-6323 United States
| | - Minyan Li
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry University of Pennsylvania 231 South 34th Street Philadelphia, Pennsylvania 19104-6323 United States
| | - Patrick J. Walsh
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry University of Pennsylvania 231 South 34th Street Philadelphia, Pennsylvania 19104-6323 United States
| | - Jason J. Chruma
- Key Laboratory of Green Chemistry & Technology, College of Chemistry and Sino-British Materials Research Institute, College of Physical Science & Technology Sichuan University Chengdu, Sichuan 610064 People's Republic of China
| |
Collapse
|
38
|
Sulfenate anions as organocatalysts for benzylic chloromethyl coupling polymerization via C=C bond formation. Nat Commun 2018; 9:1754. [PMID: 29717123 PMCID: PMC5931538 DOI: 10.1038/s41467-018-04095-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Accepted: 04/03/2018] [Indexed: 11/09/2022] Open
Abstract
Organocatalytic polymerization reactions have a number of advantages over their metal-catalyzed counterparts, including environmental friendliness, ease of catalyst synthesis and storage, and alternative reaction pathways. Here we introduce an organocatalytic polymerization method called benzylic chloromethyl-coupling polymerization (BCCP). BCCP is catalyzed by organocatalysts not previously employed in polymerization processes (sulfenate anions), which are generated from bench-stable sulfoxide precatalysts. The sulfenate anion promotes an umpolung polycondensation via step-growth propagation cycles involving sulfoxide intermediates. BCCP represents an example of an organocatalyst that links monomers by C=C double bond formation and offers transition metal-free access to a wide variety of polymers that cannot be synthesized by traditional precursor routes. Polymerization reactions are often catalysed by metal compounds and hence there are concerns surrounding toxicity, cost and environmental friendliness. Here the authors show sulfenate anions as organocatalysts for benzylic chloromethyl-coupling polymerization reactions to form poly(stilbene)s.
Collapse
|
39
|
Feng B, Lu LQ, Chen JR, Feng G, He BQ, Lu B, Xiao WJ. Umpolung of Imines Enables Catalytic Asymmetric Regio-reversed [3+2] Cycloadditions of Iminoesters with Nitroolefins. Angew Chem Int Ed Engl 2018; 57:5888-5892. [DOI: 10.1002/anie.201802492] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 03/29/2018] [Indexed: 01/08/2023]
Affiliation(s)
- Bin Feng
- CCNU-uOttawa Joint Research Centre; Key Laboratory of Pesticide & Chemical Biology; Ministry of Education, College of Chemistry; Central China Normal University; 152 Luoyu Road Wuhan Hubei 430079 China
| | - Liang-Qiu Lu
- CCNU-uOttawa Joint Research Centre; Key Laboratory of Pesticide & Chemical Biology; Ministry of Education, College of Chemistry; Central China Normal University; 152 Luoyu Road Wuhan Hubei 430079 China
| | - Jia-Rong Chen
- CCNU-uOttawa Joint Research Centre; Key Laboratory of Pesticide & Chemical Biology; Ministry of Education, College of Chemistry; Central China Normal University; 152 Luoyu Road Wuhan Hubei 430079 China
| | - Guoqiang Feng
- CCNU-uOttawa Joint Research Centre; Key Laboratory of Pesticide & Chemical Biology; Ministry of Education, College of Chemistry; Central China Normal University; 152 Luoyu Road Wuhan Hubei 430079 China
| | - Bin-Qing He
- CCNU-uOttawa Joint Research Centre; Key Laboratory of Pesticide & Chemical Biology; Ministry of Education, College of Chemistry; Central China Normal University; 152 Luoyu Road Wuhan Hubei 430079 China
| | - Bin Lu
- CCNU-uOttawa Joint Research Centre; Key Laboratory of Pesticide & Chemical Biology; Ministry of Education, College of Chemistry; Central China Normal University; 152 Luoyu Road Wuhan Hubei 430079 China
| | - Wen-Jing Xiao
- CCNU-uOttawa Joint Research Centre; Key Laboratory of Pesticide & Chemical Biology; Ministry of Education, College of Chemistry; Central China Normal University; 152 Luoyu Road Wuhan Hubei 430079 China
| |
Collapse
|
40
|
Feng B, Lu LQ, Chen JR, Feng G, He BQ, Lu B, Xiao WJ. Umpolung of Imines Enables Catalytic Asymmetric Regio-reversed [3+2] Cycloadditions of Iminoesters with Nitroolefins. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201802492] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Bin Feng
- CCNU-uOttawa Joint Research Centre; Key Laboratory of Pesticide & Chemical Biology; Ministry of Education, College of Chemistry; Central China Normal University; 152 Luoyu Road Wuhan Hubei 430079 China
| | - Liang-Qiu Lu
- CCNU-uOttawa Joint Research Centre; Key Laboratory of Pesticide & Chemical Biology; Ministry of Education, College of Chemistry; Central China Normal University; 152 Luoyu Road Wuhan Hubei 430079 China
| | - Jia-Rong Chen
- CCNU-uOttawa Joint Research Centre; Key Laboratory of Pesticide & Chemical Biology; Ministry of Education, College of Chemistry; Central China Normal University; 152 Luoyu Road Wuhan Hubei 430079 China
| | - Guoqiang Feng
- CCNU-uOttawa Joint Research Centre; Key Laboratory of Pesticide & Chemical Biology; Ministry of Education, College of Chemistry; Central China Normal University; 152 Luoyu Road Wuhan Hubei 430079 China
| | - Bin-Qing He
- CCNU-uOttawa Joint Research Centre; Key Laboratory of Pesticide & Chemical Biology; Ministry of Education, College of Chemistry; Central China Normal University; 152 Luoyu Road Wuhan Hubei 430079 China
| | - Bin Lu
- CCNU-uOttawa Joint Research Centre; Key Laboratory of Pesticide & Chemical Biology; Ministry of Education, College of Chemistry; Central China Normal University; 152 Luoyu Road Wuhan Hubei 430079 China
| | - Wen-Jing Xiao
- CCNU-uOttawa Joint Research Centre; Key Laboratory of Pesticide & Chemical Biology; Ministry of Education, College of Chemistry; Central China Normal University; 152 Luoyu Road Wuhan Hubei 430079 China
| |
Collapse
|
41
|
Wang R, Ma M, Gong X, Panetti GB, Fan X, Walsh PJ. Visible-Light-Mediated Umpolung Reactivity of Imines: Ketimine Reductions with Cy2NMe and Water. Org Lett 2018; 20:2433-2436. [DOI: 10.1021/acs.orglett.8b00778] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Rui Wang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, People’s Republic of China
| | - Mengyue Ma
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, People’s Republic of China
| | - Xu Gong
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, People’s Republic of China
| | - Grace B. Panetti
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Xinyuan Fan
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, People’s Republic of China
| | - Patrick J. Walsh
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, People’s Republic of China
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| |
Collapse
|
42
|
Wang S, Qian X, Chang Y, Sun J, Xing X, Ballard WF, Chruma JJ. Exploring the Steric and Electronic Factors Governing the Regio- and Enantioselectivity of the Pd-Catalyzed Decarboxylative Generation and Allylation of 2-Azaallyl Anions. J Org Chem 2018; 83:4054-4069. [PMID: 29557655 DOI: 10.1021/acs.joc.8b00491] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The impact of the steric and electronic factors in both the para-substituted benzaldimine and 2,2-diarylglycine components on the regioselectivity and enantioselectivity of the palladium-catalyzed decarboxylative allylation of allyl 2,2-diarylglycinate aryl imines was explored. These studies revealed that using 2,2-di(2-methoxyphenyl)glycine as the amino acid linchpin allowed for the exclusive synthesis of the desired homoallylic benzophenone imine regioisomers, independent of the nature of the imine moiety, in typically high yields. The resulting enantiomeric ratios, however, are slightly decreased in comparison to the transformations involving the corresponding allyl 2,2-diphenylglycinate imines, but this is more than balanced out by the increases in yield and regioselectivity. Overall, these studies suggest a general strategy for the highly regioselective functionalization of 2-azaallyl anions.
Collapse
Affiliation(s)
- Shuaifei Wang
- Key Laboratory of Green Chemistry & Technology (MOE), College of Chemistry and Sino-British Materials Research Institute, College of Physical Sciences & Technology , Sichuan University , Chengdu , Sichuan 610064 , PR China
| | - Xiaoyan Qian
- Key Laboratory of Green Chemistry & Technology (MOE), College of Chemistry and Sino-British Materials Research Institute, College of Physical Sciences & Technology , Sichuan University , Chengdu , Sichuan 610064 , PR China
| | - Yuanyu Chang
- Key Laboratory of Green Chemistry & Technology (MOE), College of Chemistry and Sino-British Materials Research Institute, College of Physical Sciences & Technology , Sichuan University , Chengdu , Sichuan 610064 , PR China
| | - Jiayue Sun
- Key Laboratory of Green Chemistry & Technology (MOE), College of Chemistry and Sino-British Materials Research Institute, College of Physical Sciences & Technology , Sichuan University , Chengdu , Sichuan 610064 , PR China
| | - Xiujing Xing
- Key Laboratory of Green Chemistry & Technology (MOE), College of Chemistry and Sino-British Materials Research Institute, College of Physical Sciences & Technology , Sichuan University , Chengdu , Sichuan 610064 , PR China
| | - Wendy F Ballard
- Department of Chemistry , University of Virginia , Charlottesville , Virginia 22904-4319 , United States
| | - Jason J Chruma
- Key Laboratory of Green Chemistry & Technology (MOE), College of Chemistry and Sino-British Materials Research Institute, College of Physical Sciences & Technology , Sichuan University , Chengdu , Sichuan 610064 , PR China
| |
Collapse
|
43
|
Su YL, Li YH, Chen YG, Han ZY. Ir/PTC cooperatively catalyzed asymmetric umpolung allylation of α-imino ester enabled synthesis of α-quaternary amino acid derivatives bearing two vicinal stereocenters. Chem Commun (Camb) 2018; 53:1985-1988. [PMID: 28121003 DOI: 10.1039/c6cc09654a] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A novel Ir/PTC (phase-transfer catalyst) cooperatively catalyzed asymmetric umpolung allylation of simple α-imino esters is developed and it provides facile access to α-quaternary amino acid derivatives bearing two vicinal stereocenters. Both the metal catalyst and the phase-transfer catalyst are crucial for this methodology. The reaction features good yields, high diastereo- and enantio-selectivities, ease of scale-up to gram scale and further transformation of the products (e.g. to quaternary proline analogues with multi stereocenters).
Collapse
Affiliation(s)
- Yong-Liang Su
- Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China.
| | - Yu-Hui Li
- Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China.
| | - Yu-Gen Chen
- Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China.
| | - Zhi-Yong Han
- Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China.
| |
Collapse
|
44
|
Li YH, Zhou B, Shi YM, Xun YP, Yang YH, Yang LJ. Novel 3-substituted N-methylcarbazole-imidazolium salt derivatives: Synthesis and cytotoxic activity. Chem Biol Drug Des 2018; 92:1206-1213. [PMID: 29430875 DOI: 10.1111/cbdd.13178] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 01/14/2018] [Accepted: 01/27/2018] [Indexed: 01/19/2023]
Abstract
A series of novel 3-substituted N-methylcarbazole-imidazolium salt derivatives has been prepared and evaluated in vitro against a panel of tumor cell lines (Hep G-2, Hela and PC12). The results suggest that the presence of substituted 2-methyl-imidazole or imidazole ring and substitution of the imidazolyl-3-position with a naphthylacyl or 4-bromophenacyl group were important for improving cytotoxic activity. Compounds 17, 18, 27, and 28 with 4-bromophenacyl and naphthylacyl groups displayed good activities with IC50 values of 0.09-7.20 μm against three tumor cell lines investigated and more active than DDP. Compound 35 exhibited cytotoxic activity selectively against Hela cell.
Collapse
Affiliation(s)
- Yan-Hua Li
- School of Chemistry and Environment, Key Laboratory of Ethnic Medicine Resource Chemistry, State Ethnic Affairs Commission and Ministry of Education, Yunnan Minzu University, Kunming, China
| | - Bei Zhou
- Key Laboratory for Forest Resources Conservation and Utilisation in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming, China
| | - Yi-Min Shi
- School of Chemistry and Environment, Key Laboratory of Ethnic Medicine Resource Chemistry, State Ethnic Affairs Commission and Ministry of Education, Yunnan Minzu University, Kunming, China
| | - Yu-Peng Xun
- School of Chemistry and Environment, Key Laboratory of Ethnic Medicine Resource Chemistry, State Ethnic Affairs Commission and Ministry of Education, Yunnan Minzu University, Kunming, China
| | - Yun-Han Yang
- School of Chemistry and Environment, Key Laboratory of Ethnic Medicine Resource Chemistry, State Ethnic Affairs Commission and Ministry of Education, Yunnan Minzu University, Kunming, China
| | - Li-Juan Yang
- School of Chemistry and Environment, Key Laboratory of Ethnic Medicine Resource Chemistry, State Ethnic Affairs Commission and Ministry of Education, Yunnan Minzu University, Kunming, China
| |
Collapse
|
45
|
Palladium-Catalyzed Direct α-Arylation of Methane Sulfonamides with Aryl Bromides. ChemistrySelect 2018. [DOI: 10.1002/slct.201702813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
46
|
Li Z, Hu B, Wu Y, Fei C, Deng L. Control of chemoselectivity in asymmetric tandem reactions: Direct synthesis of chiral amines bearing nonadjacent stereocenters. Proc Natl Acad Sci U S A 2018; 115:1730-1735. [PMID: 29432161 PMCID: PMC5828615 DOI: 10.1073/pnas.1718474115] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
This paper describes the mechanistic insight-guided development of a catalyst system, employing a phenolic proton donor catalyst in addition to a cinchonium-derived phase-transfer catalyst, to control the chemoselectivity of two distinct intermediates, thereby enabling the desired asymmetric tandem conjugate addition-protonation pathway to dominate over a number of side-reaction pathways to provide a synthetic approach for the direct generation of optically active amines bearing two nonadjacent stereocenters.
Collapse
Affiliation(s)
- Zhe Li
- Department of Chemistry, Brandeis University, Waltham, MA 02454-9110
| | - Bin Hu
- Department of Chemistry, Brandeis University, Waltham, MA 02454-9110
| | - Yongwei Wu
- Department of Chemistry, Brandeis University, Waltham, MA 02454-9110
| | - Chao Fei
- Department of Chemistry, Brandeis University, Waltham, MA 02454-9110
| | - Li Deng
- Department of Chemistry, Brandeis University, Waltham, MA 02454-9110
| |
Collapse
|
47
|
Li K, Shao X, Tseng L, Malcolmson SJ. 2-Azadienes as Reagents for Preparing Chiral Amines: Synthesis of 1,2-Amino Tertiary Alcohols by Cu-Catalyzed Enantioselective Reductive Couplings with Ketones. J Am Chem Soc 2018; 140:598-601. [PMID: 29272124 PMCID: PMC5936605 DOI: 10.1021/jacs.7b12213] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We introduce a new strategy for synthesis of chiral amines: couplings of α-aminoalkyl nucleophiles generated by enantioselective migratory insertion of 2-azadienes to a Cu-H. In this report, we demonstrate its application in catalytic reductive coupling of 2-azadienes and ketones to furnish 1,2-amino tertiary alcohols with vicinal stereogenic centers.
Collapse
Affiliation(s)
| | | | - Luke Tseng
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Steven J. Malcolmson
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| |
Collapse
|
48
|
Zhu M, Wang L, Wang Y, Zhou J, Ding J, Li W, Xin Y, Fan S, Wang Z, Wang Y. Biointeractions of Herbicide Atrazine with Human Serum Albumin: UV-Vis, Fluorescence and Circular Dichroism Approaches. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2018; 15:ijerph15010116. [PMID: 29324720 PMCID: PMC5800215 DOI: 10.3390/ijerph15010116] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 01/06/2018] [Accepted: 01/09/2018] [Indexed: 12/17/2022]
Abstract
The herbicide atrazine is widely used across the globe, which is a great concern. To investigate its potential toxicity in the human body, human serum albumin (HSA) was selected as a model protein. The interaction between atrazine and HSA was investigated using steady-state fluorescence spectroscopy, synchronous fluorescence spectroscopy, UV-Vis spectroscopy, three-dimensional (3D) fluorescence spectroscopy and circular dichroism (CD) spectroscopy. The intrinsic fluorescence of HSA was quenched by the atrazine through a static quenching mechanism. Fluorescence spectra at two excitation wavelengths (280 and 295 nm) showed that the fluorescence quenched in HSA was mainly contributed to by tryptophan residues. In addition, the atrazine bound to HSA, which induced changes in the conformation and secondary structure of HSA and caused an energy transfer. Thermodynamic parameters revealed that this binding is spontaneous. Moreover, electrostatic interactions play a major role in the combination of atrazine and HSA. One atrazine molecule can only bind to one HSA molecule to form a complex, and the atrazine molecule is bound at site II (subdomain IIIA) of HSA. This study furthers the understanding of the potential effects posed by atrazine on humans at the molecular level.
Collapse
Affiliation(s)
- Meiqing Zhu
- Key Laboratory of Agri-Food Safety of Anhui Province, School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China.
| | - Lijun Wang
- Key Laboratory of Agri-Food Safety of Anhui Province, School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China.
| | - Yu Wang
- Key Laboratory of Agri-Food Safety of Anhui Province, School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China.
| | - Jie Zhou
- Key Laboratory of Agri-Food Safety of Anhui Province, School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China.
| | - Jie Ding
- Key Laboratory of Agri-Food Safety of Anhui Province, School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China.
| | - Wei Li
- Key Laboratory of Agri-Food Safety of Anhui Province, School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China.
| | - Yue Xin
- Key Laboratory of Agri-Food Safety of Anhui Province, School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China.
| | - Shisuo Fan
- Key Laboratory of Agri-Food Safety of Anhui Province, School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China.
| | - Zhen Wang
- Key Laboratory of Agri-Food Safety of Anhui Province, School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China.
| | - Yi Wang
- Key Laboratory of Agri-Food Safety of Anhui Province, School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China.
| |
Collapse
|
49
|
Abstract
This review highlights the use of the bisphosphine ligand group in homogeneous catalysis.
Collapse
|
50
|
Liu Z, Li M, Wang B, Deng G, Chen W, Kim BS, Zhang H, Yang X, Walsh PJ. Chemoselective synthesis of aryl(pyridinyl)methanol derivatives through Ni-NIXANTPHOS catalyzed α-arylation and tandem arylation/rearrangement of pyridylmethyl ethers. Org Chem Front 2018. [DOI: 10.1039/c8qo00207j] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
An efficient synthesis of aryl(pyridyl)-methanol derivatives using Ni-NIXANTPHOS catalyzed α-arylation and tandem arylation/rearrangement is described.
Collapse
Affiliation(s)
- Zhengfen Liu
- Key Laboratory of Medicinal Chemistry for Natural Resources
- Ministry of Education and Yunnan Province
- School of Chemical Science and Technology
- Yunnan University
- Kunming
| | - Minyan Li
- Department of Chemistry
- Roy and Diana Vagelos Laboratories
- Penn/Merck Laboratory for High-Throughput Experimentation
- University of Pennsylvania
- Philadelphia
| | - Bijun Wang
- Key Laboratory of Medicinal Chemistry for Natural Resources
- Ministry of Education and Yunnan Province
- School of Chemical Science and Technology
- Yunnan University
- Kunming
| | - Guogang Deng
- Key Laboratory of Medicinal Chemistry for Natural Resources
- Ministry of Education and Yunnan Province
- School of Chemical Science and Technology
- Yunnan University
- Kunming
| | - Wen Chen
- Key Laboratory of Medicinal Chemistry for Natural Resources
- Ministry of Education and Yunnan Province
- School of Chemical Science and Technology
- Yunnan University
- Kunming
| | - Byeong-Seon Kim
- Department of Chemistry
- Roy and Diana Vagelos Laboratories
- Penn/Merck Laboratory for High-Throughput Experimentation
- University of Pennsylvania
- Philadelphia
| | - Hongbin Zhang
- Key Laboratory of Medicinal Chemistry for Natural Resources
- Ministry of Education and Yunnan Province
- School of Chemical Science and Technology
- Yunnan University
- Kunming
| | - Xiaodong Yang
- Key Laboratory of Medicinal Chemistry for Natural Resources
- Ministry of Education and Yunnan Province
- School of Chemical Science and Technology
- Yunnan University
- Kunming
| | - Patrick J. Walsh
- Department of Chemistry
- Roy and Diana Vagelos Laboratories
- Penn/Merck Laboratory for High-Throughput Experimentation
- University of Pennsylvania
- Philadelphia
| |
Collapse
|