反应详情

A solution of the product of Example 38E (0.225 g, 1.015 mmol) in DMF was added to 5% Pt—C, wet (225 mg, 1.153 mmol) in a 50 ml pressure bottle. The mixture was pressurized with hydrogen (40 psi), stirred for 16 hours at ambient temperature, filtered to remove catalyst, and concentrated. The residue was chromatographed on silica gel eluting with 30% ethyl acetate-hexanes to give the title compound (90 mg, 40%). 1H NMR (300 MHz, DMSO-d6) δ ppm 8.55 (dd, J=1.5, 4.6, 1H), 7.91 (dd, J=1.5, 8.0, 1H), 7.36 (dd, J=4.6, 8.0, 1H), 2.96-2.77 (m, 2H), 2.26 (dd, J=5.4, 8.1, 4H), 2.03-1.84 (m, 2H), 1.46 (s, 3H). MS (DCI) m/z 224 (M+H)+.

1. filtrationfiltered
2. customto remove catalyst
3. concentrationconcentrated
4. customThe residue was chromatographed on silica gel eluting with 30% ethyl acetate-hexanes