Abstract

Several kinds of fused cyclic compounds were obtained by tandem Michael-Claisen condensation of ethyl 2-[bis(ethylthio)methyl]benzoate and ethyl 2-[1, 3]dithiolan-2-yl-benzoate with α, β-unsaturated carbonyl compounds. Treatment of the annulated products with mercury(II)perchlorate trihydrate or N-chlorosuccinimide gave naphthoquinones, naphthalenes, and anthracenes.

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