AGN 193109 Ethyl Ester → Ethyl 4-[(7,8-dihydro-8,8-dimethyl-5-phenylnaphth-3-yl)ethynyl]benzoate

Participants

Reaction Steps

Employing the same general procedure as for the preparation of ethyl 4-[(5,6-dihydro-5,5-dimethyl-8-(4-methylphenyl)-2-naphthalenyl)ethynyl]benzoate (Compound 1), 203.8 mg (0.43 mmol) of ethyl 4-[(5,6-dihydro-5,5-dimethyl-8-(trifluoromethylsulfonyl)oxy-2-naphthalenyl)ethynyl]benzoate (Compound G) was converted into the title compound (colorless solid) using 58.2 mg (0.36 ml, 0.69 mmol) of phenyllithium (1.8M solution in cyclohexane/Et2O), 116.1 mg (0.85 mmol) of zinc chloride and 13.8 mg (0.01 mmol) of tetrakis(triphenylphosphine)palladium(0). PMR (CDCl3): δ 1.36 (6H, s), 1.40 (3H, t, J=7.1 Hz), 2.37 (2H, d, J=4.7 Hz), 4.38 (2H, q, J=7.1 Hz), 6.02 (1H, t, J=4.7 Hz), 7.20 (1H, d, J=1.5 Hz), 7.27 (1H, m), 7.39 (6H, m), 7.52 (2H, d, J=8.2 Hz), 7.98 (2H, d, J=8.2 Hz).

Provenance & Evidence