Synthesis of dihydropyrimidinones via Biginelli multi-component reaction
作者:Srinivasa Reddy Narahari、Buchi Reddy Reguri、Omprakash Gudaparthi、Mukkanti K.
DOI:10.1016/j.tetlet.2011.12.134
日期:2012.3
Five percentage perchloric acid doped silica is successfully used as an efficient mild catalyst for the synthesis of 4-aryl dihydropyrimidine-2(1H)-ones. This method offers significant advantages such as efficiency and mild reaction conditions. (C) 2012 Elsevier Ltd. All rights reserved.
One-pot synthesis of fused 3,4-dihydropyrimidin-2(1<i>H</i>)-ones and thiones using a novel ionic liquid as an efficient and reusable catalyst: improved protocol conditions for the Biginelli-like scaffolds
Abstract A novel ionic liquid with multi-SO3H groups has been found to be an efficient acid catalyst for the one-pot three-component synthesis of fused 3,4-dihydropyrimidin-2(1H)-ones and thiones under solvent free conditions. Good yields, short reaction times, straight forward workup, reusability of the catalyst and green conditions are the most obvious advantages of this methodology.