Synthesis of thieno[2,3-b]quinoxalines and pyrrolo[1,2-a]quinoxalines from 2-haloquinoxalines
作者:Montserrat Armengol、John A. Joule
DOI:10.1039/b101458g
日期:——
with functionally substituted alkynes, addition of one mol equivalent of bromine to the 2-alkynylquinoxalines thus produced and then reaction of the resulting dibromides with disodium trithiocarbonate produced 2-hydroxymethyl- and 2-(diethoxymethyl)thieno[2,3-b]quinoxalines. Addition of bromine to some 6-substituted-2-(3,3-diethoxypropyn-1-yl)quinoxalines gave pyrrolo[1,2-a]quinoxalines. Treatment of a
钯(0)催化的2-卤代喹喔啉与功能取代的偶联炔烃,向由此产生的2-炔基喹喔啉中加入一摩尔当量的溴,然后使生成的二溴化物与 三硫代碳酸二钠产生了2-羟甲基-和2-(二乙氧基甲基)噻吩并[2,3- b ]喹喔啉。将溴添加到一些6-取代的2-(3,3-二乙氧基丙炔-1-基)喹喔啉中,得到吡咯并[1,2- a ]喹喔啉。用以下试剂处理3-(1,2-二溴代烯基)喹啉,3-(1,2-二溴代烯基)吡嗪和5-(1,2-二溴代烯基)嘧啶三硫代碳酸二钠 未能诱导噻吩环形成。