反应详情

To a solution of compound (XV) (120 mg, 0.495 mmol) in absolute ethanol (5 mL) was added fumaric acid (138 mg, 1.18 mmol). The resulting suspension was sonicated until complete dissolution occurred. The solvent was removed on a rotary evaporator to give a colorless syrup which was crystallized from absolute ethanol to yield 190 mg (88%) of compound (XVI). Mp=142°-143° C. 1H NMR(D2O+TSP): δ 8.71 (s, 1H), 8.64-8.62 (m, 1H), 8.30-8.22 (d, 1H), 7.79-7.72 (m, 1H), 6.60 (s, 3H), 4.58 (s, 1H), 3.90 (s, 1H), 2.90 (s, 3H), 2.80 (s, 1H), 2.46-2.38 (m, 1H), 2.10-1.95 (d, 2H), 1.92-1.62 (m, 5H).

1. customThe resulting suspension was sonicated until complete dissolution
2. customThe solvent was removed on a rotary evaporator
3. customto give a colorless syrup which
4. customwas crystallized from absolute ethanol