Several derivatives of the novel heterocyclic systems 2-substituted-imidazo- and benzimidazo-[2,1-b]pyrimido[4,5-d][1,3]thiazine have been synthesised through the one-pot cyclocondensation of 2,4-dichloro-5-(chloromethyl)-6-methylpyrimidine with imidazolidine-2-thione and 1H-benzimidazole-2(3H)-thione and subsequently substituted by various secondary amines… Click to show full abstract
Several derivatives of the novel heterocyclic systems 2-substituted-imidazo- and benzimidazo-[2,1-b]pyrimido[4,5-d][1,3]thiazine have been synthesised through the one-pot cyclocondensation of 2,4-dichloro-5-(chloromethyl)-6-methylpyrimidine with imidazolidine-2-thione and 1H-benzimidazole-2(3H)-thione and subsequently substituted by various secondary amines in moderately good yields.
               
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