The reaction of symmetrical thiourea derivatives, RNHCSNHR, with benzoyl peroxide (BPO) gave only one isomer of 2,4-disubstituted 3,5-disubstituted imino-1,2,4-thiadiazolidines, and that of nonsymmetrical thiourea derivatives, RNHCSNHR′, with BPO yielded a mixture of some of the possible isomeric derivatives. The structures of these compounds were determined by means of NMR, mass spectra, and X-ray
对称
硫脲衍
生物 RNHCSNHR 与
过氧化苯甲酰 (
BPO) 的反应仅产生 2,4-二取代 3,5-二取代亚
氨基-
1,2,4-噻二唑烷的一种异构体,以及非对称
硫脲衍
生物 RNHCSNHR' 的异构体,与
BPO 产生一些可能的异构衍
生物的混合物。这些化合物的结构是通过核磁共振、质谱和 X 射线分析确定的。讨论了
噻二唑烷环周围基团的空间效应和一些反应机理。