Acetals of Lactams and Acid Amides. 51. Cyclization of α-Cyano-β-phenylamino-N-dimethylaminomethyleneacrylamide to Pyrimidoquinol-4-one

Article abstract of DOI:10.1007/BF00475573

Cyclization of α-cyano-β-phenylamino-N-dimethylaminomethyleneacrylamide to pyrimido<5,4-c>quinol-4-one proceeds via the intermediate formation of 1-phenyl-5-cyano-1,4-dihydropyrimidin-4-one and α-cyano-β-phenyl-amino-N-formylacrylamide.