Micelles catalyzed one pot regio- and chemoselective synthesis of benzo[a]phenazines and naphtho[2,3-d]imidazoles ‘in H2O’
作者:Vishnu K. Tandon、Manoj K. Verma、Hardesh K. Maurya、Sandeep Kumar
DOI:10.1016/j.tetlet.2014.09.103
日期:2014.11
An efficient, novel, and concise one pot regio- and chemoselective synthesis of benzo[a]phenazines (4) and naphtho[2,3-d]imidazoles (8) has been accomplished in excellent yields by nucleophilic substitution reaction of 2,3-dichloro-1,4-naphthoquinone (1) with o-phenylenediamine (2) and benzamidines (7) respectively ‘in H2O’ using base and micelles (SDS) as catalyst. Analog reaction of 2,3-dichloro-1
通过2,3的亲核取代反应,以优异的收率实现了高效,新颖,简洁的一锅区域和化学选择性合成苯并[ a ]吩嗪(4)和萘并[2,3- d ]咪唑(8)。 -二氯-1,4-萘醌(1)与邻苯二胺(2)和联am(7)分别在碱和胶束(SDS)的催化下在H 2 O中形成。在相同条件下2,3-二氯-1,4-萘醌(1)与2-氨基苯硫酚(9)的模拟反应导致形成苯并[ b]的混合物]吩噻嗪(10),苯并[ a ]吩噻嗪(11)和苯并[ a ] -1,4-苯并噻嗪基-3,2-吩噻嗪(12)的产率分别为17%,23%和57%。