Some cyclization reactions of 1,3-diphenylbenzo[e][1,2,4]triazin-7(1H)-one: preparation and computational analysis of non symmetrical zwitterionic biscyanines
作者:Theodosia A. Ioannou、Panayiotis A. Koutentis、Harry Krassos、Georgia Loizou、Daniele Lo Re
DOI:10.1039/c1ob06622f
日期:——
Regioselective nucleophilic addition of bisnucleophiles 1,2-benzenediamine, 2-amino-benzenethiol, and N-phenyl-1,2-benzenediamine to 1,3-diphenylbenzo[e][1,2,4]triazin-7(1H)-one (1) at C6 followed by intramolecular cyclocondensation at the C7 carbonyl afforded highly coloured tetracenes 1,3-diphenyl-1,6-dihydro-[1,2,4]triazino[5,6-b]phenazin-4-ium 4-methylbenzenesulfonate (12), 1,3-diphenyl-1H-[1,2
双亲核试剂的区域选择性亲核加成 1,2-苯二胺, 2-氨基苯硫醇, 和 N-苯基-1,2-苯二胺 到 1,3-二苯基苯并[ e ] [1,2,4]三嗪-7(1 H)-one(1)在C6处,然后在C7处发生分子内环缩合。羰得到了高度着色的四烯1,3,3-二苯基-1,6-二氢-[1,2,4]三嗪[5,6 - b ]吩嗪-4-甲基苯磺酸-4-鎓盐(12),1,3-二苯基-1 H- [1,2,4]三嗪[6,5- b ]吩噻嗪(14)和1,3,11-三苯基-1,6-二氢-[1,2,4]三嗪[5,6- b ]吩嗪-11- 4-甲基苯磺酸盐(15)。后者用碱中和得到游离碱1,3,11-三苯基-1 H- [1,2,4]三嗪[ 5,6- b ] phenazin-11-ium-6-ide(16)。此外,苯并三嗪酮 1与丙二酸二甲酯 给 6-(甲氧羰基)-7-氧代-1,3-二苯基-7 H-苯并呋喃[ 5,6-