反应详情

1,1-Dimethylethyl-4-[2-(4-methyl-1-oxo-1,3-dihydro-2-benzofuran-5-yl)-2-(methyloxy) ethyl]-piperazine-1-carboxylate was treated with 4M HCl in dioxane (4 mL) and stirred at room temperature for 1 h. The reaction mixture was concentrated to dryness. Analysis by LC indicated complete removal of the Bac group and formation of compound 4-methyl-5-[1-(methyloxy)-2-piperazin-1-ylethyl]-2-benzofuran-1(3H)-one hydrochloride. 1H-NMR (DMSO, 500 MHz), δ 7.747 (d, J=7.5 Hz, 1H), 7.577 (d, J=7.5 Hz, 1H), 5.402-5.388 (m, 2H), 5.113 (d, J=9 Hz, 1H), 3.850 (s, 3H), 3.496-3.327 (m, 8H), 3.228-3.140 (m, 3H), 2.500 (s, 3H).

1. concentrationThe reaction mixture was concentrated to dryness
2. customremoval of the Bac group and formation of compound 4-methyl-5-[1-(methyloxy)-2-piperazin-1-ylethyl]-2-benzofuran-1(3H)-one hydrochloride