The synthesis of ethyl 2-[(2,2-dibenzoyl)ethenyl]amino-3- dimethylaminopropenoate and its application to the synthesis of fused 3- aminopyran-2-ones and 3-aminoazolo- and -azinopyrimidin-4(4H)-ones

Article abstract of DOI:10.1002/jhet.5570350606

Ethyl 2-[(2,2-dibenzoyl)ethenyl]amino-3-dimethylaminopropenoate (3) was prepared from dibenzoylmethane (1) in two steps, and used as a reagent for preparation of fused substituted 3-aminopyranones 12-15 in over 90% yield, quinolizin-4-one 16 in over 79% y