申请人:DSM N.V.
公开号:US05438143A1
公开(公告)日:1995-08-01
Process for the preparation of substituted pyridines by allowing 1-aza-1,3-butadienes to react, in the presence of a catalytic amount of secondary amine and acid, with an aldehyde or ketone, and new 1-aza-1,3-butadienes which are used in this process. Said pyridines can be obtained in high yield in a simple process with a short reaction time. The 1-aza-1,3-butadiene can, if so desired, be prepared in situ from an imine and an aldehyde.
取代吡啶的制备过程,通过允许1-氮杂-1,3-丁二烯在次级胺和酸的催化量存在下与醛或酮反应,以及在此过程中使用的新型1-氮杂-1,3-丁二烯。所述吡啶可以通过简单且反应时间短的过程以高收率获得。如果需要,1-氮杂-1,3-丁二烯可以现场从亚胺和醛制备。