A new route to 1,3-benzoxazepines and 1,3-benzodiazepines via intramolecular aza-Wittig reaction
作者:Jyoji Kurita、Takao Iwata、Shuji Yasuike、Takashi Tsuchiya
DOI:10.1039/c39920000081
日期:——
The reaction of triphenylphosphine with the o-acyloxy-5 and o-acylamino-azidocinnamates 9, prepared from salicylaldehyde and o-aminobenzaldehyde, results in ring closure to give the 1,3-benzoxazepines 7 and 1,3-benzodiazepines 12,via the intramolecular aza-Wittig reaction of the iminophosphoranes 6 and 10 initially formed, respectively.
三苯基膦与由水杨醛和邻氨基苯甲醛制备的邻-乙酰氧基-5 和邻-乙酰氨基-叠氮肉桂酸盐 9 反应后,通过最初形成的亚氨基磷烷 6 和 10 的分子内氮-维蒂希反应,分别产生闭环生成 1,3-苯并氧氮杂卓 7 和 1,3-苯并二氮杂卓 12。