Synthetic applications of C,C-bis(iminophosphoranes): Preparation of [5+5] rigid bicyclic guanidines and 1,3,6-benzothiadiazepino[3,2-a] benzimidazole derivatives
作者:Pedro Molina、Ma Josefa Lidón、Alberto Tárraga
DOI:10.1016/s0040-4020(01)89618-6
日期:1994.1
respectively, derived from the 1-phenylbenzimidazole ring, which underwent cyclization by the action of one equivalent of isocyanate to give the [5+5] rigid bicyclic guanidines 2 or 1,3,6-benzothiadiazepino[3,2-a] benzimidazole 8.
由双(2-氨基苯基)胺衍生的双(亚氨基正膦)1的Aza Wittig型反应与两当量的异氰酸酯直接提供苯并咪唑[1,2,a ]苯并咪唑衍生物2。然而,与一当量的异氰酸酯或二硫化碳反应,分别得到了衍生自1-苯基苯并咪唑环的C-芳基亚氨基膦酸酯3或6,它们在一当量的异氰酸酯的作用下进行环化,从而得到[5 + 5]刚性双环胍2或1,3,6-苯并噻二氮杂[3,2- a ]苯并咪唑8。