Acylarylnitrosamines. Part IV. Aryne participation in decompositions of N-nitrosoacetanilide and its m- and p-t-butyl-, o-, m-, and p-chloro-derivatives in benzene
作者:D. L. Brydon、J. I. G. Cadogan、J. Cook、M. J. P. Harger、J. T. Sharp
DOI:10.1039/j29710001996
日期:——
pairs of arynophiles were allowed to compete (a) for authentic benzyne (b) for the intermediate produced by N-nitrosoacetanilide gave almost identical results in both cases, indicating that benzyne is involved in case (b) also. A mechanism involving removal of a proton ortho- to the diazonium function in the intermediate benzenediazonium acetate is proposed and an explanation for the anomalous behaviour
的分解Ñ -nitrosoacetanilide,米和- p -t -丁基- ,米- ,p - ,和ö氯代Ñ -nitrosoacetanilides苯,等溶剂,在arynophiles如蒽及其衍生物,2的存在除最后命名的亚硝酰胺外,, 3,4,5-四芳基环戊二烯酮和1,3-二苯基异苯并呋喃得到的芳烃加成物与所用的苯胺相对应,产率为4-82%。这些亚硝酰胺均未在15°下与呋喃产生相应的芳烃加成物。对叔丁基N-亚硝基乙酰苯胺在四苯基环戊二烯酮的存在下得到6-叔丁基-1,2,3,4-四苯基萘,而不是异构的1-(对叔丁基-苯基)-2,3,4-三苯基萘,因此表明二齿动物而不是单齿动物的中介。在两种情况下,允许成对的嗜碱细胞竞争(a)竞争纯苯炔(b)竞争由N-亚硝基乙酰苯胺生产的中间体的竞争实验得出几乎相同的结果,表明情况(b)也涉及苯甲醛。一种涉及去除质子邻位的机制-提出了在中间体苯重氮乙酸酯中的