Protecting Group Free Synthesis of Carboxyl-substituted Dihydropyrimidines Through Biginelli Reaction
作者:Eugeniy N. Ostapchuk、Andrey S. Plaskon、Oleksandr O. Grygorenko、Andrey A. Tolmachev、Sergey V. Ryabukhin
DOI:10.1002/jhet.1568
日期:2013.11
acetoacetic acid derivatives, and various carboxyl‐containing ureas was explored. It was found that the steric load of the urea substituents influenced strongly the reaction outcome; in particular, the method was efficient only in the case of unbranched mono‐substituted ureas bearing either aliphatic or aromaticgroups. The method allows performing a one‐pot, protectinggroup free synthesis of dihydropyrimidines