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Ag2CO3 catalyzed aza-michael addition of pyrazoles to α, β-unsaturated carbonyl compounds: A new access to N-alkylated pyrazole derivatives. Tetrahedron 2023. [DOI: 10.1016/j.tet.2023.133305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
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2
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Yang X, Sun J, Huang X, Jin Z. Asymmetric Synthesis of Structurally Sophisticated Spirocyclic Pyrano[2,3- c]pyrazole Derivatives Bearing a Chiral Quaternary Carbon Center. Org Lett 2022; 24:5474-5479. [PMID: 35857420 DOI: 10.1021/acs.orglett.2c02211] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A carbene-catalyzed enantio- and diastereoselective [2 + 4] cycloaddition reaction is developed for quick and efficient access to structurally complex multicyclic pyrano[2,3-c]pyrazole molecules. The reaction tolerates a broad scope of substrates bearing various substitution patterns, with the multicyclic pyrano[2,3-c]pyrazole products afforded in generally good to excellent yields and optical purities. The chiral molecules obtained from this approach has found promising applications in the development of novel bacteriacides for plant protection.
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Affiliation(s)
- Xiaoqun Yang
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Jun Sun
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Xuan Huang
- International Joint Research Center for Molecular Science, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
| | - Zhichao Jin
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
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3
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Han T, Wang KH, Yang M, Zhao P, Wang F, Wang J, Huang D, Hu Y. Synthesis of Difluoromethylated Pyrazoles by the [3 + 2] Cycloaddition Reaction of Difluoroacetohydrazonoyl Bromides. J Org Chem 2021; 87:498-511. [PMID: 34913680 DOI: 10.1021/acs.joc.1c02521] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
As novel and efficient difluoromethyl building blocks, difluoroacetohydrazonoyl bromides have been synthesized for the first time. The synthetic utility of this reagent for the construction of difluoromethyl organic compounds is demonstrated by their effective regioselective [3 + 2] cycloaddition reactions with ynones, alkynoates, and ynamides. The reactions provide a novel and efficient protocol to access difluoromethyl-substituted pyrazoles in good to excellent yields.
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Affiliation(s)
- Tongyu Han
- College of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
| | - Ke-Hu Wang
- College of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
| | - Ming Yang
- College of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
| | - Pengfei Zhao
- College of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
| | - Feng Wang
- College of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
| | - Junjiao Wang
- College of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
| | - Danfeng Huang
- College of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
| | - Yulai Hu
- College of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China.,State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
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4
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Zhu R, Reddy R, Ding M, Xu M, Deng C, Tadayon S, Li H, Depew K, Lane B. Development and Scale-Up of a Continuous Manufacturing Process for a Hydrazine Condensation Reaction. Org Process Res Dev 2021. [DOI: 10.1021/acs.oprd.0c00424] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ruiheng Zhu
- Shanghai SynTheAll Pharmaceutical Company Limited (“STA”), WaiGaoQiao Free Trade Zone, Shanghai 200131, People’s Republic of China
| | - Ramesh Reddy
- Shanghai SynTheAll Pharmaceutical Company Limited (“STA”), WaiGaoQiao Free Trade Zone, Shanghai 200131, People’s Republic of China
| | - Man Ding
- Shanghai SynTheAll Pharmaceutical Company Limited (“STA”), WaiGaoQiao Free Trade Zone, Shanghai 200131, People’s Republic of China
| | - Ming Xu
- Shanghai SynTheAll Pharmaceutical Company Limited (“STA”), WaiGaoQiao Free Trade Zone, Shanghai 200131, People’s Republic of China
| | - Chaoyi Deng
- Shanghai SynTheAll Pharmaceutical Company Limited (“STA”), WaiGaoQiao Free Trade Zone, Shanghai 200131, People’s Republic of China
| | - Sam Tadayon
- Shanghai SynTheAll Pharmaceutical Company Limited (“STA”), WaiGaoQiao Free Trade Zone, Shanghai 200131, People’s Republic of China
| | - Hui Li
- Agios Pharmaceuticals, Inc., Cambridge, Massachusetts 02139, United States
| | - Kristopher Depew
- Agios Pharmaceuticals, Inc., Cambridge, Massachusetts 02139, United States
| | - Benjamin Lane
- Agios Pharmaceuticals, Inc., Cambridge, Massachusetts 02139, United States
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5
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Affiliation(s)
- Pavel K. Mykhailiuk
- Enamine Ltd., Chervonotkatska 78, 02094 Kyiv, Ukraine
- Chemistry Department, Taras Shevchenko National University of Kyiv, Volodymyrska 64, 01601 Kyiv, Ukraine
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6
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Yamada T, Park K, Ito N, Masuda H, Teranishi W, Cui S, Sajiki H. Robust Continuous-Flow Synthesis of Deuterium-Labeled β-Nitroalcohols Catalyzed by Basic Anion Exchange Resin. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2020. [DOI: 10.1246/bcsj.20200067] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Tsuyoshi Yamada
- Laboratory of Organic Chemistry, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
| | - Kwihwan Park
- Laboratory of Organic Chemistry, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
| | - Naoya Ito
- Laboratory of Organic Chemistry, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
| | - Hayato Masuda
- Laboratory of Organic Chemistry, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
| | - Wataru Teranishi
- Laboratory of Organic Chemistry, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
| | - Sunliang Cui
- Institute of Drug Discovery and Design, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, P. R. China
| | - Hironao Sajiki
- Laboratory of Organic Chemistry, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
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7
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Affiliation(s)
- Luigi Vaccaro
- Laboratory of Green S.O.C.; Dipartimento di Chimica; Biologia e Biotecnologie; Università di Perugia; Via Elce di Sotto 8 06123 Perugia Italy
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