反应详情

To 4-[3-(methyloxy)-4-nitrophenyl]pyridine (Example 137, step A) (4.6 g, 20 mmol) in HOAc (20 mL) is added platinum oxide (460 mg, 2 mmol). The reaction was evacuated then refilled with 60 psi H2 gas. The reaction was stirred under a H2 atmosphere for 3 days. The reaction was evacuated and the atmosphere replaced with N2. The solvent was removed under vacuum, and the residue taken up in DCM/MeOH. Silica was added, and the solvent removed under vacuum. Silica gel chromatography provided material which contained product and other impurities. This material was dissolved in iPrOH and allowed to stand overnight. The crystals which formed were collected by decanting off the solvent and rinsing with iPrOH. Obtained the title compound of step A (500 mg, 2.4 mmol, 12%) slightly wet with iPrOH as colorless crystals. 1H NMR (400 MHz, DMSO-d6) δ 6.68-6.60 (m, 3H), 3.83 (s, 3H), 3.71 (br s, 2H), 3.38-3.31 (m, 2H), 2.85-2.75 (m, 2H), 2.59-2.49 (m, 1H), 1.91-1.75 (m, 5H).

1. customThe reaction was evacuated
2. additionthen refilled with 60 psi H2 gas
3. customThe reaction was evacuated
4. customThe solvent was removed under vacuum
5. additionSilica was added
6. customthe solvent removed under vacuum
7. customSilica gel chromatography provided material which
8. waitto stand overnight
9. customThe crystals which formed
10. customwere collected
11. customby decanting off the solvent
12. washrinsing with iPrOH