反应详情

温度

0 °C

Suspend the product of Example 1 (8 g., 79.2 mmol.) in dry methylene chloride (30 ml.) and cool to 0° C. Treat the suspension sequentially with dry triethylamine (16 ml., 118.8 mmol.) and methane sulfonyl chloride (6.74 ml., 87.12 mmol.). Stir at 5°-10° C. for 1.5 hours, and subject the mixture to flash chromatography using acetone (5-10%) in dichloromethane to yield the title compound as a white solid.