作者:Walter H. N. Nijhuis、Willem Verboom、David N. Reinhoudt
DOI:10.1055/s-1987-28033
日期:——
The hexahydropyrazino[1,2-a]quinolines 2 were prepared in good yields by reaction of 2-(4-substituted 1-piperazinyl)benzaldehydes 5 with malononitrile and subsequent thermal cyclization of the condensation products 6; the latter reaction takes place via a concerted [1,5] hydrogen transfer and subsequent ring closure by addition of a carbanion to the iminium double bond.
六氢吡嗪[1,2-a]喹啉2的合成产率良好,方法是将2-(4-取代1-哌嗪基)苯甲醛5与马来腈反应,随后对缩合产物6进行热环化;后者反应通过协同的[1,5]氢转移和随后通过羧阴离子加到亚胺双键上实现环闭合。