当在碱性水性介质中加热时,二烷基(3-苯基丙烯-2-基)(3-苯基丙炔-2-基)-溴化铵进行分子内环化,形成N,N-二烷基-4(9)-苯基-3a, 4-二氢苯并[ f ]异吲哚鎓溴化物。环化产物在C(1)–N(2)或N(2)–C(3)键处进行碱性水溶液裂解,生成2-(二烷基氨基甲基)-3-甲基和3-的混合物(二烷基氨基甲基)-2-甲基-1-苯基萘。然而,在2,2-戊亚甲基-9-苯基-3a,4-二氢苯并-[f]异吲哚鎓溴化物的情况下,仅形成C(1)–N(2)键裂解产物。
Deamination of 3-(dialkylamino)-1,4-diarylhex-5-en-1-ynes during vacuum distillation
作者:E. O. Chukhajian、К. G. Shahkhatuni、El. O. Chukhajian、L. V. Ayrapetyan、G. A. Panosyan
DOI:10.1134/s1070428017020063
日期:2017.2
During vacuum distillation of 3-(dialkylamino) derivatives of 1,4-diphenyl- and 4-phenyl-1-(p-chlorophenyl) hex-5-en-1-ynes deamination occurs resulting in a high yield of p-diarylbenzenes. The amines transformation into terbenzenes is a domino-reaction: first step consists in the β-elimination of secondary amines with the generation of conjugated dienyne which via an electrocyclic reaction transforms