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1
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Yu C, Ke F, Su J, Ma X, Li X, Song Q. Cu-Catalyzed Three-Component Cascade Synthesis of 1,3-Benzothiazines from ortho-Aminohydrazones and Bromodifluoroacetamides. Org Lett 2022; 24:7861-7865. [PMID: 36239477 DOI: 10.1021/acs.orglett.2c03399] [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
An efficient and convenient synthesis of benzo[d][1,3]thiazine has been developed by employing a copper-catalyzed transformation of readily available ketone-derived hydrazones with elemental sulfur and bromodifluoroalkylative reagents. The strategy involves an S8-catalyzed selective triple-cleavage of bromodifluoroacetamides, which acts as a C1 synthon at the 2-position of benzo[d][1,3]thiazine. A mechanism proceeding through a Cu-carbene intermediate is proposed for the C-S bond formation.
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Affiliation(s)
- Changjiang Yu
- Institute of Next Generation Matter Transformation, College of Chemical Engineering and College of Material Sciences Engineering, Huaqiao University, 668 Jimei Blvd, Xiamen 361021, Fujian, China
| | - Fumei Ke
- Institute of Next Generation Matter Transformation, College of Chemical Engineering and College of Material Sciences Engineering, Huaqiao University, 668 Jimei Blvd, Xiamen 361021, Fujian, China
| | - Jianke Su
- Institute of Next Generation Matter Transformation, College of Chemical Engineering and College of Material Sciences Engineering, Huaqiao University, 668 Jimei Blvd, Xiamen 361021, Fujian, China
| | - Xingxing Ma
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Xin Li
- Institute of Next Generation Matter Transformation, College of Chemical Engineering and College of Material Sciences Engineering, Huaqiao University, 668 Jimei Blvd, Xiamen 361021, Fujian, China
| | - Qiuling Song
- Institute of Next Generation Matter Transformation, College of Chemical Engineering and College of Material Sciences Engineering, Huaqiao University, 668 Jimei Blvd, Xiamen 361021, Fujian, China.,Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China.,State Key Laboratory of Organometallic Chemistry and Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China.,School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, Henan, China
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2
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Polina S, Putta VPRK, Gujjarappa R, Pujar PP, Malakar CC. Aza‐Michael
addition of 1,
2‐diazoles
to structurally diverse enones: Efficient methods toward
β‐amino
ketones. J Heterocycl Chem 2021. [DOI: 10.1002/jhet.4221] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Saibabu Polina
- Department of Chemistry CHRIST (Deemed to be University) Bengaluru India
| | | | - Raghuram Gujjarappa
- Department of Chemistry National Institute of Technology Manipur Imphal India
| | | | - Chandi C. Malakar
- Department of Chemistry National Institute of Technology Manipur Imphal India
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3
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Makhal PN, Nandi A, Kaki VR. Insights into the Recent Synthetic Advances of Organoselenium Compounds. ChemistrySelect 2021. [DOI: 10.1002/slct.202004029] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Priyanka N. Makhal
- Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research (NIPER) Hyderabad 500037 India
| | - Arijit Nandi
- Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research (NIPER) Hyderabad 500037 India
| | - Venkata Rao Kaki
- Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research (NIPER) Hyderabad 500037 India
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4
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Polina S, Putta VPRK, Gujjarappa R, Singh V, Pujar PP, Malakar CC. P(III)‐Mediated Cascade C‐N/C‐S Bond Formation: A Protocol towards the Synthesis of
N
,
S
‐Heterocycles and Spiro Compounds. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001149] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Saibabu Polina
- Department of Chemistry CHRIST (Deemed to be University) Bangalore 560029 India
| | | | - Raghuram Gujjarappa
- Department of Chemistry National Institute of Technology Manipur Langol Imphal 795004 Manipur India
| | - Virender Singh
- Department of Chemistry Central University of Punjab Bathinda 151001 Punjab India
| | | | - Chandi C. Malakar
- Department of Chemistry National Institute of Technology Manipur Langol Imphal 795004 Manipur India
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5
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6
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Putta VPRK, Vodnala N, Gujjarappa R, Tyagi U, Garg A, Gupta S, Pujar PP, Malakar CC. Reagent-Controlled Divergent Synthesis of 2-Amino-1,3-Benzoxazines and 2-Amino-1,3-Benzothiazines. J Org Chem 2019; 85:380-396. [DOI: 10.1021/acs.joc.9b02384] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- V. P. Rama Kishore Putta
- Department of Medicinal Chemistry, Jubilant Biosys, Bangalore 560022, Karnataka, India
- Department of Chemistry, CHRIST (Deemed to be University), Bangalore 560029, India
| | - Nagaraju Vodnala
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal 795004, Manipur, India
| | - Raghuram Gujjarappa
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal 795004, Manipur, India
| | - Ujjawal Tyagi
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal 795004, Manipur, India
| | - Aakriti Garg
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Kolkata, Chunilal Bhawan, 168, Maniktala Main Road, Kolkata 700054, India
| | - Sreya Gupta
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Kolkata, Chunilal Bhawan, 168, Maniktala Main Road, Kolkata 700054, India
| | - Prasad Pralhad Pujar
- Department of Chemistry, CHRIST (Deemed to be University), Bangalore 560029, India
| | - Chandi C. Malakar
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal 795004, Manipur, India
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7
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Geng X, Wang C, Huang C, Zhao P, Zhou Y, Wu YD, Wu AX. I 2-Promoted Multicomponent Dicyclization and Ring-Opening Sequences: Direct Synthesis of Benzo[ e][1,4]diazepin-3-ones via Dual C-O Bond Cleavage. Org Lett 2019; 21:7504-7508. [PMID: 31486652 DOI: 10.1021/acs.orglett.9b02789] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
A novel and efficient formal [4 + 2+1] annulation of aryl methyl ketones and 2-aminobenzyl alcohols for the synthesis of benzo[e][1,4]diazepin-3-ones is reported. This reaction successfully affords diverse seven-membered ring lactams via dual C-O bond cleavage. A preliminary mechanistic study showed that a multicomponent dicyclization and ring-opening sequence might occur, with the introduction of methyl sulfide proposed as the last step. This efficient strategy with mild reaction conditions and a broad substrate scope has potential applications in chemistry and medicine.
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Affiliation(s)
- Xiao Geng
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry , Central China Normal University , Wuhan 430079 , P. R. China
| | - Can Wang
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry , Central China Normal University , Wuhan 430079 , P. R. China
| | - Chun Huang
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry , Central China Normal University , Wuhan 430079 , P. R. China
| | - Peng Zhao
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry , Central China Normal University , Wuhan 430079 , P. R. China
| | - You Zhou
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry , Central China Normal University , Wuhan 430079 , P. R. China
| | - Yan-Dong Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry , Central China Normal University , Wuhan 430079 , P. R. China
| | - An-Xin Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry , Central China Normal University , Wuhan 430079 , P. R. China
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