In this book, cycloaddition of chlorocarbonyl ketenes, effective 1,3-electrophiles in synthsis of heterocycles functionalized with oxo and hydroxyl groups, with 1,2 and 1,3-binucleophiles were described to prepare the five and six-membered heterocyclic compounds. Thus, (chlorocarbonyl)phenyl ketene (CCPK) was formed by distillation of phenyl malonyl chlorides by thermal dehydrohalogenation. Then to study the cycloaddition of this CCPK with enaminones as 1,3-binuleophiles, a series of substituted 5-acyl-2-pyridinone derivatives were prepared by this condensation and exhibited one tautomer. In...