Phenyl 3-isopropylisoxazol-5-ylcarbamate → Phenyl 3-(2-fluoropropan-2-yl)isoxazol-5-ylcarbamate

Participants

Reaction Steps

Prepared from 3-(2-fluoropropan-2-yl)isoxazol-5-amine (4.83 g, 33.54 mmol) according to the method described for phenyl 3-isopropylisoxazol-5-ylcarbamate in Example 122A Step 3, to afford phenyl 3-(2-fluoropropan-2-yl)isoxazol-5-ylcarbamate as a colorless solid (6.04 g, 68%). 1H NMR (300 MHz, CDCl3) δ 7.80 (brs, 1H), 7.39-7.45 (m, 2H), 7.18-7.32 (m, 3H), 6.27 (s, 1H), 1.74 (d, J=21 Hz, 6H); LC-MS (ESI) m/z 265 (M+H)+.

Provenance & Evidence