A highly diastereoselective synthesis of trans-3,4-(difluoromethano)glutamic acid
作者:Akira Shibuya、Masahito Kurishita、Chizuru Ago、Takeo Taguchi
DOI:10.1016/0040-4020(95)00870-e
日期:1996.1
Reaction of enantiomerically pure N-(4'-bromo-4',4'-difluorocrotonoyl)oxazolidinone 5 with lithium enolate of N-diphenylmethyldeneglycinate 6 in DMF proceeded in highly diastereoselective manner to give trans-disubstituted gem-difluorocyclopropane 7, which was readily converted to the 3,4-(difluoro- methano)glutamic acid 4.