Solvent-free condensations of ketones with malononitrile catalysed by methanesulfonic acid/morpholine system
作者:M. Góra、B. Kozik、K. Jamroży、M. K. Łuczyński、P. Brzuzan、M. Woźny
DOI:10.1039/b820901d
日期:——
The preparation of ylidenemalononitriles viaKnoevenagel condensations of ketones with malononitrile under solvent-free conditions is described. Good yields and short reaction time are the features observed with methanesulfonic acid (MSA)/morpholine used as the catalyst. The wide applicability of the protocol is shown by the fact that not only unconjugated, but also aryl-alkyl ketones gave satisfactory