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Chloroformylation of 5,5-dimethyl-1,2-oxathiolan-4-one 2,2-dioxide 4 with Vilsmeier reagent (DMF/POCl3) led to the formation of cyclic b-chlorovinylaldehyde (4-chloro-5,5-dimethyl-3-formyl-1,2-oxathiolene 2,2-dioxide 5). Compound 5 reacted with formamidine, o-amino-phenol, phthalamine, amino-pyrazole and amino-tetrazole to give the corresponding heterocyclic compounds. |
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Keywords:Vilsmeier reagent, chloroformylation, b-chlorovinylaldehyde, heterocyclic compounds |
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