An efficient protocol for multicomponent synthesis of spirooxindoles employing L-proline as catalyst at room temperature
作者:Dushyant Singh Raghuvanshi、Krishna Nand Singh
DOI:10.1002/jhet.451
日期:2010.11
An efficient three‐component one‐pot synthesis of medicinally important spirooxindoles is described by the reaction of isatin, malononitrile/ethyl cyanoacetate, and dimedone/barbituric acid using L‐proline as catalyst in ethanol at roomtemperature. This approach is convenient, mild, and affords the products in high yields without the use of chromatography. J. Heterocyclic Chem., (2010).