Heteroannulation through copper catalysis: a novel cyclisation leading to an unusual formation of 2-aroylquinoxalines
作者:Rupa Mukhopadhyay、Nitya G Kundu
DOI:10.1016/s0040-4039(00)01766-4
日期:2000.12
N-[(3′-Aryl)prop-2′-ynyl]-N,N′-1,2-phenylene di-p-tosylamides, 15–22, underwent an unusual ring closure with potassium carbonate (2 equiv.) and copper(I) iodide (10 mol%) in DMF at 100°C for 24 h to yield 2-aroylquinoxalines (23–30) instead of the expected 2-alkylidene-1,4-di-tosyl-1,2,3,4-tetrahydroquinoxalines (31).
ñ - [(3'-芳基)丙-2'-炔基] - ñ,Ñ '-1,2-苯二- p -tosylamides,15 - 22(2当量),经历一个不寻常的环闭合用碳酸钾和铜(I)碘化物(10摩尔%)在DMF中于100℃进行24小时,得到2- aroylquinoxalines(23 - 30),而不是预期的2-亚烷基-1,4-二对甲苯磺酰-1,2-的, 3,4-四氢喹喔啉(31)。