Benzoic acid, 4-((5,6,7,8-tetrahydro-5,5-dimethyl-8-oxo-2-naphthalenyl)ethynyl)-, ethyl ester → Ethyl 4-[(7,8-dihydro-8,8-dimethyl-5-phenylthionaphth-3-yl)ethynyl]benzoate

Participants

Reaction Steps

Employing the same general procedure as for the preparation of ethyl 4-[(7,8-dihydro-8,8-dimethyl-5-ethylthionaphth-3-yl)ethynyl]benzoate (Compound 151), 500 mg (1.44 mmol) of ethyl 4-[(5,6,7,8-tetrahydro-5,5-dimethyl-8-oxonaphth-3-yl)ethynyl]benzoate (Compound 2) was converted into the title compound (colorless flakes, recrystallized from hexane) using 0.268 g (1.42 mmol) of titanium tetrachloride, 172 mg (1.56 mmol) of thiophenol and 291 mg (2.88 mmol) of triethylamine.

Provenance & Evidence