反应详情

温度

50 °C

To a solution of (Z)-tert-butyl 1-amino-1-(hydroxyimino)-2-methylpropan-2-ylcarbamate (Example 33 b, 2 g, 9.2 mmol) in acetonitrile (10 mL) was added triethoxymethane (CAN 122-51-0, 4.8 mL) and trifluoroacetic acid (CAN 76-05-1, 0.1 mL). The mixture was heated to 50° C. and stirred overnight. The reaction mixture was added to methanol (10 mL) and water (10 mL). After evaporation of solvents, the residue was purified by column chromatography (silica gel, 60 g, eluting with 30% to 50% ethyl acetate in petroleum ether) to give the target product (0.668 g, 32%) MS (EI): m/e=250.1 [M+H]+.

1. customAfter evaporation of solvents
2. customthe residue was purified by column chromatography (silica gel, 60 g, eluting with 30% to 50% ethyl acetate in petroleum ether)