反应详情

温度

-78 °C

n-BuLi (2.39 M, 177 μl) was slowly added to a solution of (2-trimethylsilylethoxymethyl)-N-(3,4-dimethyl-5-isoxazolyl)thiophene-3-sulfonamide (156 mg, 0.38 mmol) in THF at -78° C. under nitrogen. The reaction was stirred at -78° C. for 45 min., then benzaldehyde (45 μl, 0.42 mmol) was added in one lot at -78° C. and the solution was allowed to come to room temperature. Stirring was continued for 1 hr. Purification was achieved by column chromatography using 10% ethyl acetate/hexanes to give 179 mg 2-[2-(trimethylsilyl)ethoxymethyl]-N-(3,4-dimethyl-5-isoxazolyl)-2-(α-hydroxybenzyl)thiophene-3-sulfonamide as a yellow viscous oil (90% yield).

1. customto come to room temperature
2. stirringStirring
3. waitwas continued for 1 hr
4. customPurification