The Claisen–Schmidt condensation is an important reaction for the preparation of α,α′-bisarylidene and alkylidene cycloalkanones and chalcones. Arylidende and alkylidene cycloalkanones are important precursors for potentially bioactive pyrimidine derivatives; [ 1 1. Deli , J. ; Lorand , T. ; Szabo , D. ; Foldesi , A. Potential bioactive pyrimidine derivatives, part 1: 2-Amino-4-aryl-8 -arylidene-3,4,5,6,7,8-hexahydroquinazolines . Pharmazie 1984 , 39 , 539 . [PubMed], ...