Methanol → 2-[5-(3-{[5-(4-ethyl-1,3-thiazol-2-yl)-2-pyridinyl]oxy}propoxy)-1H-indol-1-yl]propanoic acid

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Reaction Steps

Lithium hydroxide (0.05 g, 2.15 mmol) was added to a solution of methyl 2-[5-(3-{[5-(4-ethyl-1,3-thiazol-2-yl)-2-pyridinyl]oxy}propoxy)-1H-indol-1-yl]propanoate (Example 69, 0.1 g, 0.21 mmol) in a mixture of THF (2 mL), methanol (2 mL), and water (1 mL). The reaction mixture was stirred at rt for 18 h and then concentrated under reduced pressure. The residue was diluted with water and acidified with 5% H3PO4. The aqueous layer was extracted with ethyl acetate. The combined organic extracts were dried over Na2SO4, filtered, and concentrated to give the title compound as a solid (0.079 g, 82%). 1H NMR (400 MHz, CD2Cl2) δ 8.45 (dd, 1H), 7.94 (dd, 1H), 7.08-6.62 (m, 6H), 6.22 (d, 1H), 4.94 (qt, 1H), 4.37 (t, 2H), 4.00 (t, 2H), 2.66 (qt, 2H), 2.31-2.07 (m, 2H), 1.60 (d, 3H), 1.15 (t, 3H).

Provenance & Evidence