Sodium Hydroxide → 2-Methyl-2-[2-methyl-4-[2-(5-methyl-2-phenyl-4-oxazolyl)ethoxy]phenoxy]propanoic acid

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Reaction Conditions

Reaction Steps

A solution of 2-methyl-2-{2-methyl-4-[2-(5-methyl-2-phenyloxazol-4-yl)ethoxy]phenoxy}propionic acid ethyl ester (5.00 g, 11.8 mmol) in THF (30 mL) and MeOH (60 mL) was treated with 5N aqueous NaOH (20 mL). The solution was heated at 55° C. for 1 h, cooled to ambient temperature, and concentrated in vacuo. The residue was treated with ice water (20 mL), acidified with 5N aqueous HCl (25 mL), and extracted with ethyl acetate (200 mL). The organic layer was washed with brine (40 mL), dried (Na2SO4), and concentrated to a white solid (4.46 g, 96%): mp 117° C.; 1H NMR (400 MHz, CDCl3) δ 1.53 (s, 6H), 2.19 (s, 3H), 2.38 (s, 3H), 2.98 (t, 2H, J=6.6 Hz), 4.15 (t, 2H, J=6.6 Hz), 6.58 (dd, 1H, J=3.4, 8.8 Hz), 6.70 (d, 1H, J=2.9 Hz), 6.80 (d, 1H, J=8.8 Hz), 7.38-7.45 (m, 3H), 7.97-8.00 (m, 2H); MS (FIA) m/e 394.2 [M−1].

Provenance & Evidence