Sodium Hydroxide → 4-[9-(5-{3-Chloro-4-[(1-methylethyl)oxy]phenyl}-1,2,4-oxadiazol-3-yl)-2,3-dihydro-1,4-benzoxazepin-4(5H)-yl]butanoic acid

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Reaction Steps

A solution of ethyl 4-[9-(5-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,2,4-oxadiazol-3-yl)-2,3-dihydro-1,4-benzoxazepin-4(5H)-yl]butanoate (Preparation 68) (130 mg, 0.260 mmol) in ethanol was treated with sodium hydroxide (10.4 mg in 1 ml, 0.260 mmol). The reaction mixture was left standing at RT for 1 hour then evaporated. The resulting crude was partitioned between EtOAc/water, acidified with acetic acid, separated and the organivs dried over magnesium sulphate and evaporated. The title compound (61 mg) was obtained by trituration with ether as a white solid. δH (d6DMSO, 400 MHz): 1.36 (6H, d), 1.69 (2H, m), 2.23 (2H, t), 2.43 (2H, t), 3.05 (2H, m), 3.86 (2H, s), 4.07 (2H, m), 4.88 (1H, m), 7.20 (1H, t), 7.43-7.49 (2H, m), 7.78 (1H, dd), 8.09 (1H, dd), 8.17 (1H, d), 12.10 (1H, br. s); MS (ES−): C24H2635ClN3O5 requires 471; found 470 [M−H+].

Provenance & Evidence