1
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Li J, Wang G, Guo W, Jiang J, Wang J. H 8-BINOL-Derived Chiral η 6-Benzene Ligands: New Opportunities for the Ruthenium-Catalyzed Asymmetric C-H Activation. Angew Chem Int Ed Engl 2024; 63:e202405782. [PMID: 38679580 DOI: 10.1002/anie.202405782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 04/25/2024] [Accepted: 04/25/2024] [Indexed: 05/01/2024]
Abstract
Given the tremendous success of (p-cymene)RuII-catalyzed C-H activation over the past 20 years, the community has long been aware that the development of chiral η6-benzene (Ben) ligands should be a potent strategy for achieving the attractive but incredibly underdeveloped ruthenium(II)-catalyzed asymmetric C-H activation. However, it has rarely been achieved due to the severe difficulty in developing proper chiral Ben ligands. In particular, designing chiral Ben ligands by connecting a benzene fragment to a chiral framework including benzene rings remained an unsolved challenge until this effort. Here we present a novel class of axially chiral Ben ligands derived from readily available (S)-5,5',6,6',7,7',8,8'-octahydro-1,1'-bi-2-naphthol ((S)-H8-BINOL) in 4-8 steps. Notably, when coordinated with ruthenium, such chiral Ben ligand containing three benzene rings only forms one of the three possible isomeric BenRuII complexes. The related chiral BenRuII catalysts could effectively catalyze the asymmetric C-H activation of N-sulfonyl ketimines with alkynes, affording a range of chiral spirocyclic sultams in up to 99 % yield with up to >99 % ee. These catalysts are expected to find broad applications in future.
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Affiliation(s)
- Junxuan Li
- School of Chemistry, Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, and Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, Sun Yat-Sen University, Guangzhou, 510006, P. R. China
| | - Guodong Wang
- School of Chemistry, Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, and Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, Sun Yat-Sen University, Guangzhou, 510006, P. R. China
| | - Weicong Guo
- School of Chemistry, Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, and Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, Sun Yat-Sen University, Guangzhou, 510006, P. R. China
| | - Jijun Jiang
- School of Chemistry, Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, and Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, Sun Yat-Sen University, Guangzhou, 510006, P. R. China
| | - Jun Wang
- School of Chemistry, Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, and Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, Sun Yat-Sen University, Guangzhou, 510006, P. R. China
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2
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Yang JS, Kim SG. Catalytic enantioselective [3+2] and [4+2]-annulation of cyclic N-sulfonyl ketimines with γ- or δ-hydroxy-α,β-unsaturated ketones. Chem Commun (Camb) 2024; 60:7954-7957. [PMID: 38988235 DOI: 10.1039/d4cc02734e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/12/2024]
Abstract
A highly efficient asymmetric [3+2] and [4+2]-annulation of cyclic N-sulfonyl ketimines with γ- or δ-hydroxy-α,β-unsaturated ketones has been developed. This innovative reaction employs an organocatalytic approach, utilizing a hydrogen-bonding bifunctional squaramide-based catalyst. The process enables precise synthesis of chiral polyheterotricyclic oxazolidines and 1,3-oxazinane derivatives, revealing intricate structures with incorporated chiral quaternary centers. Remarkably, this method delivers high yields and exceptional enantioselectivities and diastereoselectivities, achieving up to 99% yield, >20 : 1 dr, and >99% ee.
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Affiliation(s)
- Ji Seon Yang
- Department of Chemistry, College of Natural Science, Kyonggi University, 154-42, Gwanggyosan-ro, Yeongtong-gu, Suwon, 16227, Republic of Korea.
| | - Sung-Gon Kim
- Department of Chemistry, College of Natural Science, Kyonggi University, 154-42, Gwanggyosan-ro, Yeongtong-gu, Suwon, 16227, Republic of Korea.
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3
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Kim Y, Han JW, Kim SG. Organocatalytic Enantioselective Synthesis of Polycyclic Benzosultams from 2-Amino-β-nitrostyrenes with Cyclic N-Sulfonyl Ketimines. Org Lett 2024; 26:1472-1477. [PMID: 38349156 DOI: 10.1021/acs.orglett.4c00137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
A highly efficient enantioselective [4 + 2] cycloaddition of 2-amino-β-nitrostyrenes with cyclic N-sulfonyl ketimines has been developed. This reaction utilizes an organocatalytic approach, employing a multiple-hydrogen-bonding bifunctional squaramide-based catalyst. The process allows for the precise synthesis of chiral polycyclic benzosultams, showcasing intricate structures that incorporate chiral quaternary centers. Noteworthy outcomes of this method include high yields with excellent enantioselectivities and diastereoselectivities (up to 97% yield, 96% ee, and >20:1 dr).
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Affiliation(s)
- Yoseop Kim
- Department of Chemistry, College of Natural Science, Kyonggi University, Suwon 16227, Republic of Korea
| | - Ji Won Han
- Department of Chemistry, College of Natural Science, Kyonggi University, Suwon 16227, Republic of Korea
| | - Sung-Gon Kim
- Department of Chemistry, College of Natural Science, Kyonggi University, Suwon 16227, Republic of Korea
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4
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Hao W, Wang L, Zhang J, Teng D, Cao G. Synthesis of spiropyridazine-benzosultams by the [4 + 2] annulation reaction of 3-substituted benzoisothiazole 1,1-dioxides with 1,2-diaza-1,3-dienes. Beilstein J Org Chem 2024; 20:280-286. [PMID: 38379732 PMCID: PMC10877075 DOI: 10.3762/bjoc.20.29] [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: 12/06/2023] [Accepted: 02/01/2024] [Indexed: 02/22/2024] Open
Abstract
A simple and efficient method for the synthesis of spiropyridazine-benzosultams has been developed by means of [4 + 2] annulation reaction of 3-substituted benzoisothiazole 1,1-dioxides with 1,2-diaza-1,3-dienes. This approach displays advantages such as mild reaction conditions, wide substrate range tolerance, simple operation, compatibility with gram-scale preparation.
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Affiliation(s)
- Wenqing Hao
- College of Chemical Engineering, Qingdao University of Science and Technology, 53 Zhengzhou Lu, Qingdao 266042, China
| | - Long Wang
- College of Chemical Engineering, Qingdao University of Science and Technology, 53 Zhengzhou Lu, Qingdao 266042, China
| | - Jinlei Zhang
- College of Chemical Engineering, Qingdao University of Science and Technology, 53 Zhengzhou Lu, Qingdao 266042, China
| | - Dawei Teng
- College of Chemical Engineering, Qingdao University of Science and Technology, 53 Zhengzhou Lu, Qingdao 266042, China
| | - Guorui Cao
- College of Chemical Engineering, Qingdao University of Science and Technology, 53 Zhengzhou Lu, Qingdao 266042, China
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5
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Li H, Xiong Z, Sheng S, Chen J. Chemodivergent Synthesis of Benzothiadiazin-3-one 1-Oxides and Benzisothiazol-3-ones via Visible Light-Promoted Intramolecular N-S Bond Formation. J Org Chem 2023. [PMID: 38040659 DOI: 10.1021/acs.joc.3c01775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2023]
Abstract
We reported a versatile protocol to chemodivergently construct significant heterocyclic scaffolds of benzothiadiazin-3-one 1-oxides and benzisothiazol-3-ones by visible light-promoted photocatalysis. This substrate-dependent chemoselective strategy enables N-(2-mercaptophenyl)-N'-substituted ureas through the N-S bond coupling/oxidation cascade to selectively produce benzothiadiazin-3-one 1-oxides; however, the transformation of 2-mercaptobenzamides only occurs via N-S bond coupling to access benzisothiazol-3-ones with moderate to good yields. This strategy features mild conditions, excellent chemoselectivity, and functional group compatibility, which has potential applications in organic and medicinal chemistry.
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Affiliation(s)
- Huimin Li
- College of Chemistry & Chemical Engineering, Jiangxi Normal University, Nanchang 330022, Jiangxi, China
| | - Zhiqiang Xiong
- College of Chemistry & Chemical Engineering, Jiangxi Normal University, Nanchang 330022, Jiangxi, China
| | - Shouri Sheng
- College of Chemistry & Chemical Engineering, Jiangxi Normal University, Nanchang 330022, Jiangxi, China
| | - Junmin Chen
- College of Chemistry & Chemical Engineering, Jiangxi Normal University, Nanchang 330022, Jiangxi, China
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6
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Zhang M, Yu X, Zhu W, Liu Y, Zhang Z, Zhao J, Xia C, Li K. Iron-Catalyzed Synthesis of Benzosultams from N-Phenyl- N-(prop-2-yn-1-yl)benzenesulfonamide and Benzenesulfonyl Hydrazine. Org Lett 2023; 25:603-607. [PMID: 36656003 DOI: 10.1021/acs.orglett.2c04134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A novel route for an iron-catalyzed tandem sulfonylation, C(sp2)-H activation, cyclization reaction which uses N-phenyl-N-(prop-2-yn-1-yl)benzenesulfonamide and benzenesulfonohydrazide to synthesize derivatives of (Z)-2-phenyl-4-((phenylsulfonyl)methylene)-3,4-dihydro-2H-benzo[e][1,2]thiazine 1,1-dioxide has been developed. The method features convenient operation and good functional group tolerance. In addition, it employs insensitive and inexpensive FeSO4 as the catalyst and provides a direct approach for the preparation of benzothiazides.
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Affiliation(s)
- Mei Zhang
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai'an271016, China
| | - Xiao Yu
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai'an271016, China
| | - Wenjing Zhu
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai'an271016, China
| | - Yi Liu
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai'an271016, China
| | - Zenghui Zhang
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai'an271016, China
| | - Jinbo Zhao
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai'an271016, China
| | - Chengcai Xia
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai'an271016, China
| | - Ke Li
- Institute of Pharmacology, Pharmacy College, Shandong First Medical University & Shandong Academy of Medical Sciences, Tai'an271016, China
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7
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Pan C, Yang Z, Wu X, Yu JT, Zhu C. Substituent-Controlled Regioselective Photoinduced Cyclization of N-Allylbenzamides with N-Sulfonylaminopyridinium Salts. Org Lett 2023; 25:494-499. [PMID: 36634986 DOI: 10.1021/acs.orglett.2c04190] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The annulation reactions of N-allylbenzamides with N-sulfonylaminopyridinium salts were developed under metal-free photoinduced mild conditions. Substituent-controlled sulfonaminoarylation and sulfonaminooxylation of benzamides were realized: N-allylbenzamides lead to benzosultams, while N-(2-phenylallyl)benzamides give sulfonamidylated oxazoline derivatives. Control experiments indicated that those reactions undergo a radical pathway with arylsulfonamidyl radicals as the intermediates. The aryl C-H bond functionalization in arylsulfonamidyl was involved for the first time to give benzosultams.
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Affiliation(s)
- Changduo Pan
- School of Chemistry and Chemical Engineering, Jiangsu University of Technology, Changzhou 213001, P. R. China.,School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China.,School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
| | - Zixian Yang
- School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China
| | - Xian Wu
- School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China
| | - Jin-Tao Yu
- School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China
| | - Chengjian Zhu
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China.,Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou 450001, P. R. China
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8
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Xia S, Chen L, Li Z, Li Y, Zhou Y, Sun S, Su Y, Xu X, Shao J, Zhang Z, Kong D, Zhang F, Zheng S. Qingchang Wenzhong Decoction reduce ulcerative colitis in mice by inhibiting Th17 lymphocyte differentiation. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2022; 107:154460. [PMID: 36182798 DOI: 10.1016/j.phymed.2022.154460] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 09/06/2022] [Accepted: 09/14/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND Qingchang Wenzhong Decoction (QCWZD), a chinese herbal prescription, is widely used for ulcerative colitis (UC). Nevertheless, the active ingredients and mechanism of QCWZD in UC have not yet been explained clearly. PURPOSE This research focuses on the identification of the effective ingredients of QCWZD and the prediction and verification of their potential targets. METHODS The UC mice were established by adding 3.0% dextran sulfate sodium (DSS) to sterile water for one week. Concurrently, mice in the treatment group were gavage QCWZD or mesalazine. LC-MS analyzed the main components absorbed after QCWZD treatment, and network pharmacology predicted their possible targets. ELISA, qPCR, immunohistochemistry and immunofluorescence experiments were used to evaluate the colonic inflammation level and the intestinal barrier completeness. The percentage of Th17 and Treg lymphocytes was detected by flow cytometry. RESULTS After QCWZD treatment, twenty-seven compounds were identified from the serum. In addition, QCWZD treatment significantly reduced the increased myeloperoxidase (MPO) and inflammatory cell infiltration caused by DSS in the colonic. In addition, QCWZD can reduce the secretion of inflammatory factors in serum and promote the expression of mRNAs and proteins of occludin and ZO-1. Network pharmacology analysis indicated that inhibiting IL-6-STAT3 pathway may be necessary for QCWZD to treat UC. Flow cytometry analysis showed that QCWZD can restore the normal proportion of Th17 lymphocytes in UC mice. Mechanistically, QCWZD inhibited the phosphorylation of JAK2-STAT3 pathway, reducing the transcriptional activation of RORγT and IL-17A. CONCLUSIONS Overall, for the first time, our work revealed the components of QCWZD absorbed into blood, indicated that the effective ingredients of QCWZD may inhibit IL-6-STAT3 pathway and inhibit the differentiation of Th17 lymphocytes to reduce colon inflammation.
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Affiliation(s)
- Siwei Xia
- Chinese Medicine Modernization and Big Data Research Center, Nanjing Hospital of Chinese Medicine Affiliated to Nanjing University of Chinese Medicine, 210022, China; Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, 138 Xianlin Avenue, Nanjing, Jiangsu 210023, China
| | - Li Chen
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, 138 Xianlin Avenue, Nanjing, Jiangsu 210023, China
| | - Zhanghao Li
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, 138 Xianlin Avenue, Nanjing, Jiangsu 210023, China
| | - Yang Li
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, 138 Xianlin Avenue, Nanjing, Jiangsu 210023, China
| | - Yuanyuan Zhou
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, 138 Xianlin Avenue, Nanjing, Jiangsu 210023, China
| | - Sumin Sun
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, 138 Xianlin Avenue, Nanjing, Jiangsu 210023, China
| | - Ying Su
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, 138 Xianlin Avenue, Nanjing, Jiangsu 210023, China
| | - Xuefen Xu
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, 138 Xianlin Avenue, Nanjing, Jiangsu 210023, China
| | - Jiangjuan Shao
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, 138 Xianlin Avenue, Nanjing, Jiangsu 210023, China
| | - Zili Zhang
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, 138 Xianlin Avenue, Nanjing, Jiangsu 210023, China
| | - Desong Kong
- Chinese Medicine Modernization and Big Data Research Center, Nanjing Hospital of Chinese Medicine Affiliated to Nanjing University of Chinese Medicine, 210022, China.
| | - Feng Zhang
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, 138 Xianlin Avenue, Nanjing, Jiangsu 210023, China.
| | - Shizhong Zheng
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, 138 Xianlin Avenue, Nanjing, Jiangsu 210023, China.
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9
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Dhankhar J, Hofer MD, Linden A, Čorić I. Site-Selective C-H Arylation of Diverse Arenes Ortho to Small Alkyl Groups. Angew Chem Int Ed Engl 2022; 61:e202205470. [PMID: 35830351 DOI: 10.1002/anie.202205470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Indexed: 01/07/2023]
Abstract
Catalytic systems for direct C-H activation of arenes commonly show preference for electronically activated and sterically exposed C-H sites. Here we show that a range of functionally rich and pharmaceutically relevant arene classes can undergo site-selective C-H arylation ortho to small alkyl substituents, preferably endocyclic methylene groups. The C-H activation is experimentally supported as being the selectivity-determining step, while computational studies of the transition state models indicate the relevance of non-covalent interactions between the catalyst and the methylene group of the substrate. Our results suggest that preference for C(sp2 )-H activation next to alkyl groups could be a general selectivity mode, distinct from common steric and electronic factors.
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Affiliation(s)
- Jyoti Dhankhar
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
| | - Micha D Hofer
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
| | - Anthony Linden
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
| | - Ilija Čorić
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
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10
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Site‐Selective C–H Arylation of Diverse Arenes Ortho to Small Alkyl Groups. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202205470] [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]
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11
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Intramolecular Arylation of 2‐Bromobenzenesulfonamides Using DMSO/HCOONa ⋅ 2H
2
O System: An Access To Dibenzosultams. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200140] [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]
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12
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Li G, Zhang Y, Zeng H, Feng X, Su Z, Lin L. Water enables diastereodivergency in bispidine-based chiral amine-catalyzed asymmetric Mannich reaction of cyclic N-sulfonyl ketimines with ketones. Chem Sci 2022; 13:4313-4320. [PMID: 35509468 PMCID: PMC9006921 DOI: 10.1039/d2sc00446a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Accepted: 03/20/2022] [Indexed: 01/23/2023] Open
Abstract
Tuning diastereoselectivity is a great challenge in asymmetric catalysis for the inherent stereochemical bias of the substrates. Here, we report a diastereodivergent asymmetric Mannich reaction of cyclic N-sulfonyl ketimines with ketones catalyzed by a bispidine-based chiral amine catalyst, in which additional water switches the diastereoselectivity efficiently. Both chiral anti- and syn-benzosultams with potential anti-HIV-1 activity are obtained in excellent yields and good to excellent ee values. Control experiments and density functional theory (DFT) calculations were applied to study the diastereodivergent mechanism, which reveal that the diastereodivergent catalysis should be state-determined, and the water reverses the energies of states to realize the diastereodivergency. The findings are quite new and might inspire more diastereodivergent asymmetric synthesis. A diastereodivergent asymmetric Mannich reaction of cyclic N-sulfonyl ketimines with ketones is realized by employing bispidine-based chiral amine as catalyst and additional water switching the diastereoselectivity.![]()
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Affiliation(s)
- Gonglin Li
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 China http://www.scu.edu.cn/chem_asl/
| | - Yan Zhang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 China http://www.scu.edu.cn/chem_asl/
| | - Hongkun Zeng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 China http://www.scu.edu.cn/chem_asl/
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 China http://www.scu.edu.cn/chem_asl/
| | - Zhishan Su
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 China http://www.scu.edu.cn/chem_asl/
| | - Lili Lin
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 China http://www.scu.edu.cn/chem_asl/
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13
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Laha JK, Gupta P. Sulfoxylate Anion Radical-Induced Aryl Radical Generation and Intramolecular Arylation for the Synthesis of Biarylsultams. J Org Chem 2022; 87:4204-4214. [PMID: 35245054 DOI: 10.1021/acs.joc.1c03031] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Aryl radical generation from the corresponding aryl halides using an electron donor and subsequent intramolecular cyclization with arenes could be an important advancement in contemporary biaryl synthesis. A green and practically useful synthetic protocol to access diverse six- and seven-membered biarylsultams especially with a free NH group including demonstration of a gram-scale synthesis is reported herein. The sulfoxylate anion radical (SO2-•), generated in situ from the reagents rongalite or sodium dithionite (Na2S2O4), was found to be the key single electron transfer agent forming aryl radicals from aryl halides, which upon intramolecular arylation gives biarylsultams with good to excellent yields. The approach features generation of aryl radicals that remained underexplored, use of a cheap and readily available industrial reagents, and transition metal-free, mild, and green reaction conditions.
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Affiliation(s)
- Joydev K Laha
- Department of Pharmaceutical Technology (Process Chemistry), National Institute of Pharmaceutical Education and Research, S. A. S. Nagar, Punjab 160062, India
| | - Pankaj Gupta
- Department of Pharmaceutical Technology (Process Chemistry), National Institute of Pharmaceutical Education and Research, S. A. S. Nagar, Punjab 160062, India
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14
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Luo Z, Chen X, Xue J, Deng Y, Dong S, Liu S. Efficient synthesis of benzosultams containing continuous quaternary carbons via trapping active ylides with cyclic N-sulfonyl ketimines. Org Chem Front 2022. [DOI: 10.1039/d2qo01409b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A rapid and efficient method for the synthesis of benzosultams containing continuous quaternary carbons in a one pot fashion has been developed with moderate to excellent yields at room temperature under air. The resulting products exhibit good anticancer activity in osteosarcoma cells.
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Affiliation(s)
- Zhengli Luo
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Xuwen Chen
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Jian Xue
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Yaqi Deng
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Suzhen Dong
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Shunying Liu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
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15
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Sunke R, Ahmed Khan S, Kumara Swamy KC. Pd-catalysed intramolecular transformations of indolylbenzenesulfonamides: ortho-sulfonamido-bi(hetero)aryls via C2-arylation and polycyclic sultams via C3 arylation. Org Biomol Chem 2022; 20:9148-9160. [DOI: 10.1039/d2ob01610a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Indolyl substituted iodo-sulfonamides deliver 2-aryl(sulfonamido)indoles in the presence of Pd(OAc)2/Ph3P/Et3N; the same reactants, using Pd(OAc)2/Ph3P/K2CO3, afford indole-fused sultams.
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Affiliation(s)
- Rajnikanth Sunke
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, Telangana, India
| | - Shabbir Ahmed Khan
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, Telangana, India
| | - K. C. Kumara Swamy
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, Telangana, India
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Belen’kii LI, Gazieva GA, Evdokimenkova YB, Soboleva NO. The literature of heterocyclic chemistry, Part XX, 2020. ADVANCES IN HETEROCYCLIC CHEMISTRY 2022. [DOI: 10.1016/bs.aihch.2022.10.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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17
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Sabourin A, Dufour J, Vors JP, Bernier D, Montchamp JL. Synthesis of P-Substituted 5- and 6-Membered Benzo-Phostams: 2,3-Dihydro-1 H-1,2-benzazaphosphole 2-Oxides and 2,3-Tetrahydro-1 H-1,2-benzazaphosphinine 2-Oxides. J Org Chem 2021; 86:14684-14694. [PMID: 34633805 DOI: 10.1021/acs.joc.1c01501] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Several approaches were developed for the preparation of phosphorus-substituted 5- and 6-membered benzophostams. Carbodiimide-promoted cyclization of zwitterionic aminophosphinates derived from a nitrobenzene precursor accomplished the cyclization in good yields. Alternatively, a novel copper-catalyzed cross-coupling between a phosphonamide and a bromobenzene precursor produced the heterocycles in moderate to good yields. Three different methods are compared for the synthesis of the P-ethoxy-substituted 5-membered benzophostam.
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Affiliation(s)
- Axel Sabourin
- Department of Chemistry and Biochemistry, TCU Box 298860, Texas Christian University, Fort Worth, Texas 76129, United States
| | - Jeremy Dufour
- Bayer SAS, Centre de Recherche La Dargoire, 14-20 impasse Pierre Baizet, CEDEX, Lyon 69263, France
| | - Jean-Pierre Vors
- Bayer SAS, Centre de Recherche La Dargoire, 14-20 impasse Pierre Baizet, CEDEX, Lyon 69263, France
| | - David Bernier
- Bayer SAS, Centre de Recherche La Dargoire, 14-20 impasse Pierre Baizet, CEDEX, Lyon 69263, France
| | - Jean-Luc Montchamp
- Department of Chemistry and Biochemistry, TCU Box 298860, Texas Christian University, Fort Worth, Texas 76129, United States
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Li J, Shi H, Zhang S, Rudolph M, Rominger F, Hashmi ASK. Switchable Divergent Synthesis in Gold-Catalyzed Difunctionalizations of o-Alkynylbenzenesulfonamides with Aryldiazonium Salts. Org Lett 2021; 23:7713-7717. [PMID: 34569242 DOI: 10.1021/acs.orglett.1c02621] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Gold-catalyzed difunctionalizations of o-alkynylbenzenesulfonamides with aryldiazonium salts are reported herein. Upon irradiation with the blue LEDs, benzosultam products were formed via aminoarylation accompanied by the release of N2. Without irradiation, aryldiazonium salts were engaged as efficient electrophiles, facilitating electrophilic deaurations of the vinyl-Au(I) intermediates, followed by tautomerization to give the N-aryl-substituted α-imino (E)-hydrazones. The regioselectivities of 6-endo-dig and 5-exo-dig cyclizations were excellent.
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Affiliation(s)
- Jun Li
- Organisch Chemisches Institut, Heidelberg University, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Hongwei Shi
- Organisch Chemisches Institut, Heidelberg University, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Shan Zhang
- Organisch Chemisches Institut, Heidelberg University, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Matthias Rudolph
- Organisch Chemisches Institut, Heidelberg University, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Frank Rominger
- Organisch Chemisches Institut, Heidelberg University, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - A Stephen K Hashmi
- Organisch Chemisches Institut, Heidelberg University, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany.,Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
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Sandeep K, Siva Reddy A, Kumara Swamy KC. Palladium-catalysed cyclisation of ynamides and propargyl tethered iodosulfonamides with boronic acids leading to benzosultams. Org Biomol Chem 2021; 19:6871-6882. [PMID: 34323909 DOI: 10.1039/d1ob00925g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
An efficient and straightforward Pd-catalysed synthesis of diversely substituted sultams utilising ynamides and boronic acids is disclosed; toluene was found to be the most suitable solvent for this transformation. This strategy has been successfully applied to generate dihydrobenzo[d]isothiazole 1,1-dioxides and dihydro-2H-benzo[e][1,2]thiazine 1,1-dioxides. The advantages of this protocol are good functional group tolerance, broad substrate scope, high-yielding reaction and low catalyst loading to access benzofused sultams with five-/six-membered rings. The synthetic utility has been demonstrated by a gram-scale synthesis. A plausible catalytic cycle involving carbopalladation has been proposed for this transformation.
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Affiliation(s)
- K Sandeep
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, Telangana, India.
| | - Alla Siva Reddy
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, Telangana, India.
| | - K C Kumara Swamy
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, Telangana, India.
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Hys VY, Milokhov DS, Keda TY, Omelchenko IV, Konovalova IS, Shishkina SV, Volovenko YM. Efficient synthesis of seven-membered Aza-sultams: Heterofused amino-1,2,4-thiadiazepine dioxides. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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