Treatment of 2-propylideneimino guanidinium acetate with lead tetraacetate, in methylene chloride containing solid sodium carbonate, afforded the previously unknown 3,3-dimethyl-5-imino-Δ1-1,2,4-triazoline. Similarly, N,N′-diphenyl-N″-(2-propylideneimino)guanidinium acetate afforded Z-4-phenyl-5-phenylimino-Δ1-1,2,4-triazoline as the major oxidation product and the corresponding E isomer as a minor product. Stereochemistry was established spectrophotometrically and also by isomerizing the minor (E) isomer to the major (Z) isomer.
用含有固体
碳酸钠的
氯甲烷中的
乙酸2-
丙烯基
亚胺酸
铅和
乙酸盐反应,得到了以前未知的3,3-二甲基-5-
亚胺-Δ
1-
1,2,4-三唑烯。类似地,N,N′
-二苯基-N″-(2-
丙烯基
亚胺)
亚胺酸
铅生成了Z-4-苯基-5-苯基
亚胺-Δ
1-
1,2,4-三唑烯作为主要氧化产物,相应的E异构体作为次要产物。立体
化学通过光谱和将次要(E)异构体异构为主要(Z)异构体来确定。