N. Lashgari, Ghodsi Mohammadi Ziarani, Alireza Badiei
Sep 30, 2012
Citations
0
Influential Citations
21
Citations
Journal
European Journal of Chemistry
Abstract
The Knoevenagel condensation between isatins and active methylene compounds like malononitrile and ethyl cyanoacetate to prepare 2-oxoindolin-3-ylidene malononitrile/ cyanoacetates is described. The reactions occur in the presence of sulfonic acid functionalized silica SBA-15 (SBA-Pr-SO 3 H) in an aqueous medium giving excellent yields of the products in short reaction times. SBA-Pr-SO 3 H with a pore size of 6 nm is found to be an efficient and environmentally benign catalyst for this reaction.