反应详情

A mixture of Example 128B (14.21 g, 49.46 mmol) and Pt2O (7.00 g, 30.8 mmol) in acetic acid (200 mL) was shaken in a reactor pressurized with 60 psi of H2 at 25° C. for 80 hours, filtered, and concentrated. The concentrate was treated with dichloromethane (142 mL) and TFA (24 mL) and stirred for 3 hours. The organic layer was washed with NaOH (2×250 mL) and brine (200 mL), dried (MgSO4), filtered, and concentrated to provide the desired product (8.17 g, 86%). MS (ESI(+)) m/e 192 (M+H)+; MS (ESI(−)) m/e 190 (M−H)−; 1H NMR (300 MHz, DMSO-d6) δ 6.83 (d, 1H), 6.53 (d, 1H), 2.72 (m, 2H), 2.57 (m, 2H), 1.64 (m, 4H).

1. filtrationfiltered
2. concentrationconcentrated
3. additionThe concentrate was treated with dichloromethane (142 mL) and TFA (24 mL)
4. washThe organic layer was washed with NaOH (2×250 mL) and brine (200 mL)
5. dry with materialdried (MgSO4)
6. filtrationfiltered
7. concentrationconcentrated