Iodine was explored as an efficient catalyst for the synthesis of tetrahydropyrimidines 4 and pyrrolidines 5 by a multicomponent reaction of dialkyl acetylenedicarboxylates (=dialkyl but‐2‐ynedioates) 1, amines 2, and HCHO 3 at room temperature (Scheme). When the molar ratios of these substrates were 1 : 2 : 4 and 1 : 1 : 4, tetrahydropyrimidines and pyrrolidines were formed, respectively. The products
碘进行了探讨作为四氢
嘧啶的合成的有效催化剂4和
吡咯烷5通过二烷基acetylenedicarboxylates(=二烷基丁-2- ynedioates)的多组分反应1,胺2,和HCHO 3在室温(方案)。当这些底物的摩尔比为1:2:4和1:1:4时,分别形成四氢
嘧啶和
吡咯烷。在短时间内(25-35分钟)以高收率(73-85%)获得了产品。