期刊
CHEMICAL SCIENCE
卷 5, 期 10, 页码 3915-3921出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4sc01221f
关键词
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资金
- PRIN (Progetto Nazionale Stereoselezioni in Chimica Organica: Metodologie ed Applicazioni)
- Bologna University
- Fondazione Del Monte
- European Commission [FP7-201431]
The highly stereoselective addition of aldehydes to isoquinolines, promoted by the Hayashi-Jorgensen secondary amine catalyst, is described. The procedure has a wide scope, with CbzCl or Boc(2)O used to activate isoquinoline to nucleophilic addition, allowing for the facile generation of useful synthetic intermediates in high enantiomeric excesses. The products obtained are synthetic intermediates for the synthesis of tetrahydroprotoberberine alkaloids. This methodology has been applied in the first enantioselective synthesis of 13-methyl tetrahydroprotoberberine, as reported herein.
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