反应详情

A solution of (38) (1.77 g, 4.78 mmol) in 4M HCl in dioxane (20 mL) was stirred at ambient temperature for 30 min. Removal of the solvent in vacuo afforded the title compound (39) as a white crystalline solid (1.4 g, 88%). 1H—NMR (CDCl3, 400 MHz): δ 0.85 (d, 6H), 1.17 (m, 1H), 1.30 (m, 1H), 1.58 (m, 1H), 2.32 (m, 1H), 2.57 (m, 2H), 3.03 (m, 2H), 5.09 (s, 2H), 7.30 (m, 5H), 8.39 (br.s, 3H). MS (ESI) m/z 250.25 (M+H+).

1. customRemoval of the solvent in vacuo