in this area. The literature claimed a different behaviour with phenylisothiocyanate. We have shown that the author's assumptions are based on incorrect structure determination of the products. The addition occurs also on the CN double bond of phenylisothiocyanate and the evolution of the primary adduct (i.e. a thioimidazolidone) is explained by the formation of a biradical stabilized through a capto-dative
根据在该领域的先前工作,由芳酰基
氮丙啶的热开环产生的偶氮甲
亚胺基的环加成发生在苯基
异氰酸酯的CN双键处。文献声称苯基异
硫氰酸酯具有不同的行为。我们已经证明作者的假设是基于对产品结构的错误确定。该加成也发生在苯基异
硫氰酸酯的CN双键上,伯加成物(即
硫代
咪唑烷酮)的生成通过通过巯基加和作用稳定的双自由基形成而得以解释。该双自由基环化成瞬态1,3-
噻唑烷12A。