A simple and efficient method is developed for the synthesis of 2-(benzothiazol-2-yl)-3-(substituted phenyl)acrylonitrile from 2-(benzothiazole-2-yl)-3-oxopentanedinitrile and aromatic aldehydes in the presence of a catalytic amount of piperdine into ethanol at reflux. Advantage of this procedure is relatively good yields (81-86%) with short reaction times (1.5-3 h), under moderate reaction conditions and simple workup procedure, plus easy preparation and handling of the catalyst.
开发了一种简单有效的方法,用于在芳香醛存在下,由 2-(
苯并噻唑-2-基)-3-氧代
戊二腈和芳香醛合成 2-(
苯并噻唑-2-基)-3-(取代苯基)
丙烯腈。在回流下将催化量的
哌啶转化为
乙醇。该方法的优点是反应时间短(1.5-3小时),反应条件温和,后处理程序简单,收率相对较高(81-86%),并且催化剂易于制备和处理。