New derivatives of 2-(1-amino-1-phenylmethyl)-1,3,4-oxadiazole and 1,2,4-triazin-6-one were synthesised in the reactions of optically active α-aminocarboxylic acid hydrazides and triethyl orthoesters in xylene. The electronic and steric effects of substituents at the α position influencing the formation of five- or six-membered products are discussed.
在旋光性α-
氨基
羧酸酰
肼与邻位三乙基的反应中合成了2-(1-
氨基-1-苯基甲基)-1,3,4-恶二唑和
1,2,4-三嗪-6-的新衍
生物二
甲苯中的酯。讨论了α位上取代基的电子和空间效应影响五元或六元产物的形成。