α,β-Unsaturated Carboxylic Acid Derivatives. XII. A Convenient Synthesis of Oxazole-4-carboxylic and 3,3-Dibromo-2,2-diamino Acids
作者:Chung-gi Shin、Yoshiaki Sato、Hidetoshi Sugiyama、Katsumi Nanjo、Juji Yoshimura
DOI:10.1246/bcsj.50.1788
日期:1977.7
Treatment of t-butyl 2-acetylamino-3-bromo-2-alkenoate with triethylamine gave t-butyl 5-alkyl-2-methyloxazole-4-carboxylate by dehydrobromination, but no reaction occurred with primary amines. While treatment of t-butyl 2-acetylimino-3,3-dibromoalkanoate with hydroxylamine or several aliphatic and aromatic primary amines gave addition products, t-butyl 2-acetylamino-3,3-dibromo-2-(hydroxyamino)- and
用
三乙胺处理 2-乙酰
氨基-3-溴-2-链烯酸叔丁酯,通过脱
溴化氢得到 5-烷基-
2-甲基恶唑-4-羧酸叔丁酯,但与
伯胺不发生反应。用
羟胺或几种脂肪族和芳香族
伯胺处理 2-乙酰亚
氨基-3,3-二
溴链烷酸叔丁酯得到加成产物 2-乙酰
氨基-3,3-二
溴-2-(羟基
氨基)-和2- (取代的
氨基)链烷酸酯,分别以相当好的产率。