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7 (31.5 mg, 47 mmole, 1.0 eq) was dissolved in 4/1 methanol/ethyl acetate (1.25 mL) and 15 mg of 20% palladium hydroxide on carbon (wet) was added. The vessel was evacuated and charged with hydrogen and stirred overnight. The catalyst was fitered over celite and the filtrate evaporated to give the title compound in nearly quantitative yield. 1H NMR (500 MHz, DMSO-d6): δ 12.23 (br s, 1H), 9.54 (s, 1H), 8.50 (s, 2H), 8.28 (s, 1H), 7.42 (d, 2H), 7.24 (t, 2H), 6.95 (t, 1H), 3.84 (d, 2H), 2.70 (br s, 2H), 1.54-1.38 (m, 2H), 0.88 (m, 4H).

1. additionwas added
2. customThe vessel was evacuated
3. additioncharged with hydrogen
4. customthe filtrate evaporated