Transitional activation phenomena: synthesis of the 4H-benzo[e][1,3,4]-thiadiazine ring
作者:I. T. Barnish、M. S. Gibson
DOI:10.1039/j39700000854
日期:——
A synthesis of 1,3,4H-benzothiadiazine derivatives from α-bromo- and α-chlorobenzaldehyde 2,4-dihalogenophenylhydrazones and potassium thioacetate is described. The process involves displacement of ortho-halogen, considered to be transiently activated during the course of reaction : the ease of displacement of ortho-halogen is F > Br > Cl.
描述了由α-溴-和α-氯苯甲醛2,4-二卤代苯基phenyl和硫代乙酸钾合成1,3,4 H-苯并噻二嗪衍生物。该过程涉及邻卤的置换,认为在反应过程中该卤被瞬时激活:邻卤的置换容易度为F> Br> Cl。