Department of Chemistry, Jadavpur University, Kolkata-700 032, India E-mail : mallikak52@yahoo.co.in Manuscript received 4 November 2009, accepted 27 November 2009 Base-catalyscd cyclocondensation of α,α'-bis(arylmethylene)cyclohexanones with guanidine hydrochloride has been found to generate E-2-amino-4-aryl-8-(arylmethylene)-5,6,7,8-tetrahydrobenzo[d]pyrimidines in high yield, the structures or which have been established from their analytical and spectral data. The corresponding lower

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... es, α,α'- bis(arylmethylcne)cyclopcntanones also were found to produce similar products viz. E-2-amino-4-aryl-7-(arylmethylene)- cyclopenteno[1,2-d]pyrlmidines in comparable yield under the same reaction condition.