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Campbell JW, Cotnam MJ, Annan FR, Hilborn JW, Thompson A. Synthesis of chiral systems featuring the pyrrole unit: a review. Chem Commun (Camb) 2024. [PMID: 39292192 DOI: 10.1039/d4cc03601h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/19/2024]
Abstract
Synthetic strategies towards pyrroles within chiral frameworks are summarised, focussing on reports published 2010-2023. The synthesis of pyrroles featuring substituents bearing chiral centres are summarised, as are those whereby pyrroles are located within axially chiral systems courtesy of restricted bond rotation.
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Affiliation(s)
- Jacob W Campbell
- Department of Chemistry, Dalhousie University, P. O. Box 15000, Halifax, Nova Scotia, B3H 4R2, Canada.
| | - Michael J Cotnam
- Department of Chemistry, Dalhousie University, P. O. Box 15000, Halifax, Nova Scotia, B3H 4R2, Canada.
| | - Francisca R Annan
- Department of Chemistry, Dalhousie University, P. O. Box 15000, Halifax, Nova Scotia, B3H 4R2, Canada.
| | - James W Hilborn
- Department of Chemistry, Dalhousie University, P. O. Box 15000, Halifax, Nova Scotia, B3H 4R2, Canada.
| | - Alison Thompson
- Department of Chemistry, Dalhousie University, P. O. Box 15000, Halifax, Nova Scotia, B3H 4R2, Canada.
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2
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Han S, Seo I, Ryu DH. Enantioselective Friedel-Crafts Reaction of Heteroaromatic Compounds with Glyoxals Catalyzed by Chiral Oxazaborolidinium Ion Catalyst. Org Lett 2023; 25:6813-6817. [PMID: 37703524 DOI: 10.1021/acs.orglett.3c02284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/15/2023]
Abstract
A catalytic enantioselective Friedel-Crafts reaction of various heteroaromatic compounds with glyoxals has been developed. In the presence of a chiral oxazaborolidinium ion catalyst, the reaction provided chiral α-hydroxyketones in high yield (up to 96%) with excellent enantioselectivity (up to >99% ee). The synthetic utility of this method was illustrated by conversion of the products to various derivatives such as 1,2-diol and β-amino alcohol.
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Affiliation(s)
- Shinyeong Han
- Department of Chemistry, Sungkyunkwan University, 300 Cheoncheon, Jangan, Suwon, 16419, Korea
| | - Injoo Seo
- Department of Chemistry, Sungkyunkwan University, 300 Cheoncheon, Jangan, Suwon, 16419, Korea
| | - Do Hyun Ryu
- Department of Chemistry, Sungkyunkwan University, 300 Cheoncheon, Jangan, Suwon, 16419, Korea
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3
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Biswas A. Aromatic C-H bond functionalization through organocatalyzed asymmetric intermolecular aza-Friedel-Crafts reaction: a recent update. Beilstein J Org Chem 2023; 19:956-981. [PMID: 37404800 PMCID: PMC10315893 DOI: 10.3762/bjoc.19.72] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Accepted: 06/15/2023] [Indexed: 07/06/2023] Open
Abstract
The aza-Friedel-Crafts reaction allows an efficient coupling of electron-rich aromatic systems with imines for the facile incorporation of aminoalkyl groups into the aromatic ring. This reaction has a great scope of forming aza-stereocenters which can be tuned by different asymmetric catalysts. This review assembles recent advances in asymmetric aza-Friedel-Crafts reactions mediated by organocatalysts. The mechanistic interpretation with the origin of stereoselectivity is also explained.
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Affiliation(s)
- Anup Biswas
- Department of Chemistry, Hooghly Women’s College, Vivekananda Road, Pipulpati, Hooghly - 712103, WB, India
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4
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Liu S, Zhang L, Xu L, Gao P, Duan XH, Guo LN. Fe-Catalyzed Alkylazidation of α-Trifluoromethylalkenes: An Access to Quaternary Stereocenters Containing CF 3 and N 3 Groups. Org Lett 2023. [PMID: 36815835 DOI: 10.1021/acs.orglett.3c00439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
A concise Fe-catalyzed alkylazidation of α-trifluoromethylalkenes via a C-C bond cleavage/radical addition/azidation cascade is described. This protocol features a broad substrate scope, excellent functional group compatibility, and the ability to be performed on a gram scale, thus offering a practical and step-economic approach to the synthetically useful tertiary α-trifluoromethyl azides.
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Affiliation(s)
- Shuai Liu
- Department of Chemistry, School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Material Chemistry and Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Lu Zhang
- Department of Chemistry, School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Material Chemistry and Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Liang Xu
- School of Chemistry and Chemical Engineering, Key Laboratory for Green Processing of Chemical Engineering of Xin-jiang Bingtuan, Shihezi University, Shihezi, Xinjiang 832003, China
| | - Pin Gao
- Department of Chemistry, School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Material Chemistry and Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Xin-Hua Duan
- Department of Chemistry, School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Material Chemistry and Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Li Na Guo
- Department of Chemistry, School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Material Chemistry and Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
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5
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Sumii Y, Iwasaki H, Fujihira Y, Mahmoud EM, Adachi H, Kagawa T, Cahard D, Shibata N. KHMDS/Triglyme Cryptate as an Alternative to Phosphazene Base in Stereodivergent Pentafluoroethylation of N-Sulfinylimines Using HFC-125. J Org Chem 2022; 87:15806-15819. [PMID: 36315641 DOI: 10.1021/acs.joc.2c01821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
A protocol for the stereodivergent pentafluoroethylation of N-sulfinylimines using HFC-125 with KHMDS/triglyme has been developed. Both diastereomers of the pentafluoroethylated amines can be selectively synthesized based on the presence or absence of triglyme. This additive-controlled protocol allows the KHMDS/triglyme cryptate to be a straightforward and cheap alternative to previously reported base-controlled stereodivergent trifluoromethylation using potassium hexamethyldisilazide (KHMDS) versus P4-tBu.
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Affiliation(s)
- Yuji Sumii
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa-Ku, Nagoya 466-8555, Japan
| | - Hiroto Iwasaki
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa-Ku, Nagoya 466-8555, Japan
| | - Yamato Fujihira
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa-Ku, Nagoya 466-8555, Japan
| | - Elsayed M Mahmoud
- Department of Nanopharmaceutical Sciences, Nagoya Institute of Technology, Gokiso, Showa-Ku, Nagoya 466-8555, Japan.,Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt
| | - Hiroaki Adachi
- Tosoh Finechem Corporation, 4988, Kaiseicho, Shunan 746-0006, Japan
| | - Takumi Kagawa
- Tosoh Finechem Corporation, 4988, Kaiseicho, Shunan 746-0006, Japan
| | - Dominique Cahard
- CNRS UMR 6014 COBRA, Normandie Université, 76821 Mont Saint Aignan, France
| | - Norio Shibata
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa-Ku, Nagoya 466-8555, Japan.,Department of Nanopharmaceutical Sciences, Nagoya Institute of Technology, Gokiso, Showa-Ku, Nagoya 466-8555, Japan
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6
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Ogura K, Isozumi I, Takehara T, Suzuki T, Nakamura S. Enantioselective Reaction of N-Unprotected Activated Ketimines with Phosphine Oxides Catalyzed by Chiral Imidazoline-Phosphoric Acids. Org Lett 2022; 24:8088-8092. [DOI: 10.1021/acs.orglett.2c03457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kazuki Ogura
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-8555, Japan
| | - Itsuki Isozumi
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-8555, Japan
| | - Tsunayoshi Takehara
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki-shi, Osaka 567-0047, Japan
| | - Takeyuki Suzuki
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki-shi, Osaka 567-0047, Japan
| | - Shuichi Nakamura
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-8555, Japan
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7
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Li M, Chen Y, Yan Y, Liu M, Huang M, Li W, Cao L, Zhang X. Organocatalytic asymmetric synthesis of quaternary α-isoxazole–α-alkynyl amino acid derivatives. Org Biomol Chem 2022; 20:8849-8854. [DOI: 10.1039/d2ob01746f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Chiral phosphoric acid catalyzed enantioselective addition of 5-amino-isoxazoles with β,γ-alkynyl-α-ketimino esters provided good yields and excellent enantioselectivities.
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Affiliation(s)
- Min Li
- Department of Chemistry, Xihua University, China
- Asymmetric Synthesis and Chiral Technology Key Laboratory of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yihua Chen
- Department of Chemistry, Xihua University, China
| | - Yingkun Yan
- Department of Chemistry, Xihua University, China
- Asymmetric Synthesis and Chiral Technology Key Laboratory of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Min Liu
- Department of Chemistry, Xihua University, China
- Asymmetric Synthesis and Chiral Technology Key Laboratory of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Min Huang
- Department of Chemistry, Xihua University, China
- Asymmetric Synthesis and Chiral Technology Key Laboratory of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Wenzhe Li
- Department of Chemistry, Xihua University, China
- Asymmetric Synthesis and Chiral Technology Key Laboratory of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Lianyi Cao
- Department of Chemistry, Xihua University, China
- Asymmetric Synthesis and Chiral Technology Key Laboratory of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Xiaomei Zhang
- Department of Chemistry, Xihua University, China
- Asymmetric Synthesis and Chiral Technology Key Laboratory of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, China
- University of Chinese Academy of Sciences, Beijing, China
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