BENZOIN IN HETEROCYCLIC SYNTHESIS: SYNTHESIS AND REACTIONS OF 4.CYANO-2%DIPHENYL-2H-PYRROL-5-THIONE ... Fathy A. Khalifa, Nabila A. Ismail+, Ahmed HH Elghandour and Husseln F. Zohdl Department of Chemistry. Faculty of Science, Cairo University,Giza, AR Egypt. +Department of Chemistry, Faculty of Science, Zagazig University,Zagazig,AREgypt. ... Keywords: Benzoin; cyanothioacetamide; pyrrolethione; ...