Reaction of ethyl 3,3-diaminoacrylate with pyrimidine series o-chloro ketones. Synthesis of pyrido[4,3-d]pyrimidines and 6H-1,3,6,7-tetra-azaphenalenes
摘要:
Cyclocondensation of ethyl 3,3-diaminoacrylate with 5-acetyl-4-chloropyrimidines gave ortho- and peri-condensed heterocycles formed through substitution of the chlorine atom by the alpha-carbon atom of the enediamine and condensation of the amino group with the carbonyl or by addition of the amino group to the pyridine ring.