Ammonium Hydroxide → HCID 60165965, compound

Participants

Reaction Steps

A solution of 1-(4-methoxyphenyl)benzo[d]pyrrolo[2,1-b]thiazole-2,3-dicarboxylate (1.7 g, 4.3 mmol) in anhydrous dichloromethane (30 mL) was added dropwise to a stirred mixture of lithium aluminum hydride (0.4 g, 10.0 mmol) in anhydrous ether (20 mL) at −5° C. to 0° C. The reaction mixture was allowed to stir at this temperature for 20 min. The excess hydride was decomposed by adding water (1 mL) followed by NH4OH (1 mL) and water (1 mL) at −5° C. to 0° C. The mixture was filtered through a pad of Celite, washed with several times with dichloromethane. The combined filtrate and washings were washed successively with water and brine solution. The organic layer was dried (Na2SO4) and concentrated to dryness in vacuo. The residue was crystallized from ethanol to give (1-(4-methoxyphenyl)benzo[d]pyrrolo[2,1-b]thiazole-2,3-diyl)-dimethanol (BO-1646), 1.3 g (91%); mp 156-157° C. 1H NMR (DMSO-d6) δ 3.85 (3H, s, MeO), 4.22 (2H, d, J=4.8 Hz, CH2), 4.66 (3H, m, CH2 and exchangeable OH), 5.09 (1H, t, J=4.8 Hz, exchangeable, OH), 6.85-6.87 (1H, m, ArH), 7.08-7.19 (4H, m, 4×ArH), 7.39-7.42 (2H, m, 2×ArH), 7.76-7.79 (1H, m, ArH). Anal. Calcd. for (C19H17NO3S): C, 67.24; H, 5.05; N, 4.13; S, 9.45. Found: C, 67.54; H, 5.00; N, 4.00; S, 9.30.

Provenance & Evidence