A simple and convenient synthesis of 3-methylene-4-aryl-1,3,4,5-tetrahydrobenzo[b][1,4]diazepin-2-ones was accomplished by the SN2 nucleophilic substitution of the acetates of Baylis-Hillman adducts of acrylate with 1,2-phenylenediamines, followed by base-mediated intramolecular cyclization. Similar substrates derived from the Baylis-Hillman adducts of acrylonitrile via Pinner’s reaction led to 3-arylmethylene-4,5-dihydro-3H-benzo[b][1,4]diazepin-2-ylamines in good yields.
一种简单方便的合成3-亚甲基-4-芳基-1,3,4,5-四氢苯并[b][1,4]二氮杂平-2-酮的方法,通过
丙烯酸盐的Baylis-Hillman加成产物的
醋酸酯与1,2-
苯二胺的SN2亲核取代反应实现,随后进行碱介导的分子内环化。通过Pinner反应从
丙烯腈的Baylis-Hillman加成产物衍生的类似底物,也能够以良好的产率合成3-芳基亚甲基-4,5-二氢-3H-苯并[b][1,4]二氮杂平-2-基胺。