Preparation of 1,3,3a,7a-tetrahydroisothianaphthene and its application to tetrahydrothiophene-fused porphyrin.

[摘要]：(Biomolecules and Their Synthetic Analogs) Section Dehydrobromination of 5,6-dibromoperhydroisothianaphthene with DBU gave a mixt. of 1,3,3a,7a and 1,3,3a,4-tetrahydroisothianaphthene in 5:1 ratio. The former compd. acted as an s-cis diene in the Diels-Alder reaction with PhO2SCH:CHSO2Ph to give an adduct, which was successively converted to tetrahydrothiphene-fused pyrroles and a zinc porphyrin.

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