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He T, Yang X. Catalyst-free addition/sulfonyl-assisted nucleophilic N–F hydrolysis of α-methylstyrenes with N,N-Difluorobenzenesulfonamides. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Lim JJ, Arrington K, Dunn AL, Leitch DC, Andrews I, Curtis NR, Hughes MJ, Tray DR, Wade CE, Whiting MP, Goss C, Liu YC, Roesch BM. A Flow Process Built upon a Batch Foundation—Preparation of a Key Amino Alcohol Intermediate via Multistage Continuous Synthesis. Org Process Res Dev 2020. [DOI: 10.1021/acs.oprd.9b00478] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- John Jin Lim
- Chemical Development, API Chemistry, GlaxoSmithKline, Upper Providence, Pennsylvania 19426, United States
| | - Kenneth Arrington
- Chemical Development, API Chemistry, GlaxoSmithKline, Upper Providence, Pennsylvania 19426, United States
| | - Anna L. Dunn
- Chemical Development, API Chemistry, GlaxoSmithKline, Upper Providence, Pennsylvania 19426, United States
| | - David C. Leitch
- Chemical Development, API Chemistry, GlaxoSmithKline, Upper Providence, Pennsylvania 19426, United States
- Department of Chemistry, University of Victoria, Victoria, BC V8P 5C2, Canada
| | - Ian Andrews
- Chemical Development, API Chemistry, GlaxoSmithKline, Upper Providence, Pennsylvania 19426, United States
| | - Neil R. Curtis
- Chemical Development, API Chemistry, GlaxoSmithKline, Stevenage SG1 2NY, U.K
| | - Mark J. Hughes
- Chemical Development, API Chemistry, GlaxoSmithKline, Stevenage SG1 2NY, U.K
| | - Daniel R. Tray
- Chemical Development, API Chemistry, GlaxoSmithKline, Stevenage SG1 2NY, U.K
| | - Charles E. Wade
- Chemical Development, API Chemistry, GlaxoSmithKline, Stevenage SG1 2NY, U.K
| | - Matthew P. Whiting
- Chemical Development, API Chemistry, GlaxoSmithKline, Stevenage SG1 2NY, U.K
| | - Charles Goss
- Chemical Development, Product and Process Engineering, GlaxoSmithKline, Upper Providence, Pennsylvania 19426, United States
| | - Yangmu Chloe Liu
- Chemical Development, API Chemistry, GlaxoSmithKline, Stevenage SG1 2NY, U.K
| | - Brian M. Roesch
- Chemical Development, API Chemistry, GlaxoSmithKline, Stevenage SG1 2NY, U.K
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Mathieu G, Patel H, Lebel H. Convenient Continuous Flow Synthesis of N-Methyl Secondary Amines from Alkyl Mesylates and Epoxides. Org Process Res Dev 2020. [DOI: 10.1021/acs.oprd.0c00193] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Gary Mathieu
- Department of Chemistry and Center in Green Chemistry and Catalysis (CGCC), Université de Montréal, P.O. Box 6128, Station Downtown, Montréal, QC H3C 3J7, Canada
| | - Heena Patel
- Department of Chemistry and Center in Green Chemistry and Catalysis (CGCC), Université de Montréal, P.O. Box 6128, Station Downtown, Montréal, QC H3C 3J7, Canada
| | - Hélène Lebel
- Department of Chemistry and Center in Green Chemistry and Catalysis (CGCC), Université de Montréal, P.O. Box 6128, Station Downtown, Montréal, QC H3C 3J7, Canada
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Bi HY, Du M, Pan CX, Xiao Y, Su GF, Mo DL. Nickel(II)-Catalyzed [5 + 1] Annulation of 2-Carbonyl-1-propargylindoles with Hydroxylamine To Synthesize Pyrazino[1,2- a]indole-2-oxides in Water. J Org Chem 2019; 84:9859-9868. [PMID: 31347845 DOI: 10.1021/acs.joc.9b00784] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
An atom-economical and practical method for the efficient synthesis of various pyrazino[1,2-a]indole-2-oxides was developed through a nickel(II)-catalyzed [5 + 1] annulation of 2-carbonyl-1-propargylindoles with hydroxylamine in water without using an organic solvent. The reaction involved an initial condensation of 2-carbonyl-1-propargylindoles with hydroxylamine to afford oxime intermediates, which then underwent a nickel(II)-catalyzed 6-exo-dig cyclization. Preliminary studies showed that (n-Bu)4NI served as a phase transfer catalyst and promoted the formation of active nickel(II) species. More importantly, the nickel(II) salt and phase transfer catalyst-in-water could be recycled seven times, and a gram scalable product was easily obtained in good yields through a filtration and washing protocol.
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Affiliation(s)
- Hong-Yan Bi
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, School of Chemistry & Pharmaceutical Sciences , Guangxi Normal University , 15 Yu Cai Road , Guilin 541004 , China
| | - Min Du
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, School of Chemistry & Pharmaceutical Sciences , Guangxi Normal University , 15 Yu Cai Road , Guilin 541004 , China
| | - Cheng-Xue Pan
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, School of Chemistry & Pharmaceutical Sciences , Guangxi Normal University , 15 Yu Cai Road , Guilin 541004 , China
| | - Yuhong Xiao
- School of Chemistry and Chemical Engineering , Hunan University of Science and Technology , Xiangtan 411201 , P. R. China
| | - Gui-Fa Su
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, School of Chemistry & Pharmaceutical Sciences , Guangxi Normal University , 15 Yu Cai Road , Guilin 541004 , China
| | - Dong-Liang Mo
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, School of Chemistry & Pharmaceutical Sciences , Guangxi Normal University , 15 Yu Cai Road , Guilin 541004 , China
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