Thiamine hydrochloride (VB1): an efficient promoter for the one-pot synthesis of benzo[4,5]imidazo[1,2-a]pyrimidine and [1,2,4]triazolo[1,5-a]pyrimidine derivatives in water medium
作者:Junhua Liu、Min Lei、Lihong Hu
DOI:10.1039/c2gc16499j
日期:——
A straightforward and general method has been developed for the synthesis of benzo[4,5]imidazo[1,2-a]pyrimidine and [1,2,4]triazolo[1,5-a]pyrimidine derivatives by simply combining 2-aminobenzimidazole or 3-amino-1,2,4-triazole, aldehyde, and β-dicarbonyl compound in the presence of a catalytic amount of thiamine hydrochloride (VB1). The advantages of this method are the use of an inexpensive and readily
已经开发了一种简单而通用的方法来合成 苯并[4,5]咪唑并[1,2- a ]嘧啶和[1,2,4]三唑并[1,5- a ]嘧啶衍生物简单地组合即可2-氨基苯并咪唑 或者 3-氨基1,2,4-三唑, 醛以及β-二羰基化合物在催化量的 盐酸硫胺素(VB 1)。这种方法的优点是使用便宜且容易获得的催化剂,简便的后处理,提高的产量以及使用 水 作为 溶剂 被认为是相对环境友好的。