JOURNAL OF CHEMICAL RESEARCH, no.7, pp.378-379, 2008 (SCI-Expanded)
2-[(3-Ethyl-4-oxo-3,4-dihydroquinazolin-2-yl)mercaptoacetyl hydrazono]-3-alkyl/aralkyl-5-ethyl/propylthiazolidin-4-ones were synthesised by the cyclisation of 1-[(3-ethyl-4-oxo-3,4-dihydroquinazolin-2-yl)mercaptoacetyl]-4alkyl/aralkyl thiosemicarbazides with ethyl 2-bromobutanoate or ethyl 2-bromopentanoate in the presence of anhydrous sodium acetate in anhydrous ethanolic medium. The regioisomer 2-alkyl/aralkyl 3-[(3-ethyl-4-oxo-3,4dihydroquinazolin-2-yl)mercaptoacetylamino]-5-ethyl/propylthiazolidin-4-ones were not formed.