Hexafluoroacetone as a protecting and activating reagent: 5,5-difluoro- and trans -5-fluoropipecolic acids from glutamic acid
摘要:
Starting from hexafluoroacetone-protected (S)-glutamic acid, trans-5-fluoropipecolic and 5,5-difluoropipecolic acid have been synthesized. The piperidine ring was constructed by an intramolecular metal carbenoid NH insertion. (C) 2003 Elsevier Ltd. All rights reserved.
Hexafluoroacetone as a protecting and activating reagent: 5,5-difluoro- and trans -5-fluoropipecolic acids from glutamic acid
摘要:
Starting from hexafluoroacetone-protected (S)-glutamic acid, trans-5-fluoropipecolic and 5,5-difluoropipecolic acid have been synthesized. The piperidine ring was constructed by an intramolecular metal carbenoid NH insertion. (C) 2003 Elsevier Ltd. All rights reserved.