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 Это и многое другое вы найдете в книге The Condensation of (Chlorocarbonyl)phenyl ketene with Bisnucleophiles (Mehdi Abaszadeh)