On the reactions of (vinylimino)phosphoranes and related compounds. Part 30. Short new synthesis of 5-azaazulene derivatives. Some comments on reactivities of (vinylimino)phosphoranes
作者:Makoto Nitta、Yukio Iino、Satoshi Mori、Tohru Takayasu
DOI:10.1039/p19950001001
日期:——
A short new synthesis of phenyl-substituted and annulated 5-azaazulene (cyclopenta[c]azepine) derivatives 15–18 consists of the reaction of [(1-phenylvinyl)imino]- and benz-annulated [(cycloalkenyl)imino]-phosphoranes 8–11 with 5-(dimethylaminomethylene)cyclopenta-1,3-dienecarbaldehyde 1 in an enamine alkylation (Michael addition) process, subsequent proton migration–ketonization, and condensation
苯基取代的和环化5- azaazulene(环戊二烯并[的简短新合成Ç ]氮杂)衍生物15 - 18由[(1-苯基乙烯基)亚氨基]的反应的-和苯并-环[(环烯基)亚氨基] -phosphoranes 8 - 11 5-(二甲氨基亚甲基)环戊二烯基-1,3- dienecarbaldehyde 1中的烯胺烷基化与所述膦亚胺部分(氮杂Wittig反应)的甲酰基的(迈克尔加成)处理,随后的质子迁移酮化,并冷凝。在另一方面,醛的反应1与(vinylimino)正膦12 - 14,其具有在相对于氮原子的α位没有苯基,由一个分子内氮杂Wittig反应或醛的取代反应的1与正膦12 - 14和随后水解,得到5-(氨基亚甲基)环戊二烯-1- ,3-二烯甲醛19及其衍生物20和21。在选择性的上下文中膦的反应观察到的8 - 11和12 - 14用醛1,分别对化合物MNDO计算1和12A,12B以及在模型化合物8C