反应详情

Ethyl 1-methylcyclopentanecarboxylate (47 g, 301 mmol), acetonitrile (14.5 g, 363 mmol), NaH (18 g, 450 mmol), NaOH (6.8 g, 170 mmol) and hydroxylamine hydrochloride (4 g, 57 mmol) were sequentially combined by a procedure analogous to Example B10 to provide 3-(1-methylcyclopentyl)isoxazol-5-amine (7 g, 70% yield over 2 steps). 1H NMR (400 MHz, DMSO-d6): δ 6.41 (s, 2 H), 4.81 (s, 1 H), 1.91-1.86 (m, 2H), 1.67-1.48 (m, 6 H), 1.19 (s, 3 H); MS (ESI) m/z: 167.1 (M+H+).