反应详情

Compound (63) (1.26 g, 3.69 mmol) was refluxed with conc. HCl (20 ml) for 5 hr. After cooling to room temperature, the white precipitate was collected by filtration, washed with cold water, and dried in high vacuo to afford 1.08 g (93%) of the title compound as a white solid. m.p. 242-243° C.; 1H NMR (200 MHz, CDCl3/CD3OD) δ 0.90 (3H, t, J=7.5 Hz), 2.07 (2H, q, J=7.5 Hz), 7.59 (1H, t, J=1.8 Hz), 7.67 (2H, d, J=1.8 Hz); HRMS (EI) Calcd. 312.0068, Found 312.0049.

1. filtrationthe white precipitate was collected by filtration
2. washwashed with cold water
3. customdried in high vacuo