Acetic Acid → 5-(1-{4-[2-(tert-Butyl-dimethyl-silanyloxy)-3,3-dimethyl-butoxy]-3-methyl-phenyl}-1-ethyl-propyl)-3-methyl-thiophene-2-sulfonic acid acetyl-amide

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Reaction Steps

A mixture of 5-(1-{4-[2-(tert-Butyl-dimethyl-silanyloxy)-3,3-dimethyl-butoxy]-3-methyl-phenyl}-1-ethyl-propyl)-3-methyl-thiophene-2-sulfonic acid amide (227 mg, 0.4 mmol), EDCI (92 mg, 0.48 mmol), acetic acid (27 μL, 0.48 mmol) and DMAP (50 mg) in dichloromethane (10 ml) is stirred at RT overnight. The reaction is diluted with dichloromethane and washed with 1N HCl. The organic phase is concentrated and chromatographed (Hex to 20% EtOAc/Hex) to give the title compound (240 mg, 98%). 1H NMR (CDC3) δ 7.99 (s, 1H), 7.02 (d 1H, J=8.8 Hz), 6.96 (s, 1H), 6.69 (d, 1H, J=8.8 Hz), 6.59 (s, 1H), 3.98 (dd, 1H, J=3.4, 9.8 Hz), 3.85 (dd, 1H, J=5.8, 9.8 Hz), 3.67 (dd, 1H, J=3.4, 5.8 Hz), 2.43 (s, 3H), 2.20 (s, 3H), 2.13 9s, 3H), 2.06 (q, 4H), 0.96 (s, 9H), 0.89 (s, 9H), 0.70 (t, 6H), 0.11 (s, 3H), 0.05 (s, 3H);

Provenance & Evidence