The behavior of s-triazine (I) towards active methylene compounds has been investigated. I reacts with ethyl acetoacetate (IIIa) to give 2, 6-dimethyl-3, 5-dicarbethoxypyridine (IX). The reaction of I with 2, 4pentanedione (IIIb) and ethyl cyan+ acetate (IIIc) leads to the formation of 3-aminomethylene-2, 4pentanedione(Xa) and ethyl 2-aminomethylenecyanoacetate (Xb), respectively. Malononitrile (IIId) cleaves the s-triazine ring with formation of a mixture of ...
