Bs. Jursic, A simple method for knoevenagel condensation of alpha,beta-conjugated and aromatic aldehydes with barbituric acid, J HETERO CH, 38(3), 2001, pp. 655-657
Several aromatic and alpha,beta -conjugated aromatic aldehydes were condens
ed with barbituric acid in methanol solution in the absence of acid or base
as a catalyst, affording 5-ylidenebarbituric acid derivatives in almost qu
antitative yields.