Lithium Hydroxide → HCID 58883444, compound

Participants

Reaction Steps

A solution of 6-(3-fluoro-4-methoxycarbonylmethyl-phenylethynyl)-4,4-dimethyl-3,4-dihydro-naphthalene-1-carboxylic acid ethyl ester (Intermediate 204, 0.15 g, 0.36 mmol) in ethanol (3 mL) and tetrahydrofuran (3 mL) was treated with a 2M solution of lithium hydroxide (1.5 mL, 3 mmol) and the resulting reaction mixture was stirred at ambient temperature for 1.5 h. The volatiles were evaporated in vacuo, the residue was neutralized with saturated aqueous ammonium chloride solution and extracted with diethyl ether and ethyl acetate. The organic phase was dried over anhydrous magnesium sulfate, filtered and evaporated in vacuo to a residue that was purified by preparative reverse phase HPLC using 5% water in acetonitrile as the mobile phase to afford the title product (0.04 g, 27%). 1H NMR (300 MHz, CDCl3): δ 7.81 (d, J=8.2 Hz, 1H), 7.46 (d, J=1.7 Hz, 1H), 7.37 (dd, J=8.2 &1.7 Hz, 1H), 7.27-7.09 (m, 3H), 7.07 (t, J=4.8 Hz, 1H), 4.31 (q, J=7.0 Hz, 2H), 3.66 (s, 2H), 2.33 (d, J=4.8 Hz, 2H), 1.37 (t, J=7.0 Hz, 3H), 1.27 (s, 6H).

Provenance & Evidence