Synthesis of structurally diverse 3,4-dihydropyrimidin-2(1<i>H</i>)-ones via sequential Biginelli and Passerini reactions
作者:Andreas C Boukis、Baptiste Monney、Michael A R Meier
DOI:10.3762/bjoc.13.7
日期:——
Biginelli reaction was combined with the Passerini reaction for the first time in a sequential multicomponent tandemreaction approach. After evaluation of all possible linker components and a suitable solvent system, highly functionalized dihydropyrimidone-alpha-acyloxycarboxamide compounds were obtained in good to excellent yields. In a first reaction step, different 3,4-dihydropyrimidin-2(1H)-one acids
β-Cyclodextrin-assisted synthesis of Biginelli adducts under solvent-free conditions
作者:Natália Aparecida Liberto、Sarah de Paiva Silva、Ângelo de Fátima、Sergio Antonio Fernandes
DOI:10.1016/j.tet.2013.07.024
日期:2013.9
β-cyclodextrin as a solid catalyst for the solvent-free synthesis of various Biginelli adducts. The advantages of our protocol included the following: (i) a metal-free methodology; (ii) high yields; (iii) simple and efficient work-up procedures; (iv) improved results under solvent-free conditions. β-cyclodextrin-catalyzed the Biginelli reactions for various aldehydes, demonstrating that it is an efficient and eco-friendly