Synthesis of pyrimido[1,6-<i>a</i>]quinoxalines via intermolecular trapping of thermally generated acyl(quinoxalin-2-yl)ketenes by Schiff bases
作者:Svetlana O Kasatkina、Ekaterina E Stepanova、Maksim V Dmitriev、Ivan G Mokrushin、Andrey N Maslivets
DOI:10.3762/bjoc.14.147
日期:——
Acyl(quinoxalin-2-yl)ketenes generated by thermal decarbonylation of 3-acylpyrrolo[1,2-a]quinoxaline-1,2,4(5H)-triones react regioselectively with Schiff bases under solvent-free conditions to form pyrimido[1,6-a]quinoxaline derivatives in good yields.
3-酰基
吡咯并[1,2-a]喹喔啉-1,
2,4(5H)-三
酮热
脱羰生成的酰基(
喹喔啉-2-基)
烯酮在无溶剂条件下与席夫碱发生区域选择性反应,形成
嘧啶基[ 1,6-a]
喹喔啉衍
生物的收率良好。