Sodium Hydroxide → HCID 68953819, compound

Participants

Reaction Steps

A product obtained in Example 55 (3.1 g, 6.9 mmol) was dissolved in ethanol (50 ml), adding 1 mol/L NaOH (13.9 ml). The mixture was stirred at room temperature for 2 hours. Then the mixture was concentrated under reduced pressure followed by adding water. The aqueous phase was washed with ethyl acetate and adjust to pH 5˜6 by 1 mol/L hydrochloric acid. The precipitated solid was collected by filtration and washed by water to give pale yellow powder. The solid was dissolved in alkali solution and adjust the pH again to give the refine product (2.6 g, 89.5%). mp 172˜174° C. 1HNMR (DMSO-d6) δ: 2.30˜2.49 (2H, m, CH2), 2.58˜2.63 (1H, d, CH2), 2.89˜2.95 (1H, m, CH2), 3.08 (1H, dd, CH2), 3.23 (1H, dd, N—CH), 3.38˜3.47 (2H, m, CH2), 3.74 (3H, s, Ar—OCH3), 3.79 (1H, s, Ar—OCH3), 4.25 (1H, d, CH2), 4.59 (2H, q, OCH2CO), 6.66 (1H, s, ArH), 6.73 (1H, s, ArH), 7.05 (1H, s, ArH).

Provenance & Evidence