Diazomethane adds in two directions to R2C=S, R = ethyl, propyl, isopropyl, tert-butyl; the dependence of the regioisomer ratio on R and on solvent polarity discloses the nature of the orienting forces. The thione-S-methylides generated by N2 extrusion from 1,3,4-thiadiazolines undergo 1,4-H shift or electrocyclization.
重氮甲烷在两个方向上加成R 2 C = S,R =乙基,丙基,异丙基,叔丁基;区域异构体比例对R和溶剂极性的依赖性揭示了取向力的性质。由N 3从1,3,4-
噻二唑啉中挤出产生的
硫酮S-甲基化物经历1,4-H移位或电环化。