A Straightforward Preparation of Chiral 5-(Aminomethyl)oxazole Derivatives from .ALPHA.-Amino Esters and .ALPHA.-Lithiated Isocyanides.
作者:Masashi OHBA、Hiroyuki KUBO、Shigeki SETO、Tozo FUJII、Hiroyuki ISHIBASHI
DOI:10.1248/cpb.46.860
日期:——
An efficient and general preparation of several chiral N-protected 5-(aminomethyl)oxazoles has been accomplished by treatment of N-protected α-amino esters with α-lithiated isocyanides, obtained by metalation of methyl and benzyl isocyanides with BuLi or of ethyl isocyanide with lithium diisopropylamide.
通过将甲基和苄基异氰酸酯与 BuLi 金属化,或将乙基异氰酸酯与二异丙基酰胺锂金属化,可以用 α-硫代异氰酸酯处理 N 保护的 α-氨基酯,从而高效而普遍地制备出多种手性 5-(氨基甲基)噁唑。