反应详情

To a stirred solution of the material from Step 6 (3.27 g, 5.68 mmol) in dichloromethane (57 mL) were added 4-methylmorpholine N-oxide (0.8 g, 6.81 mmol), and activated 4 Å molecular sieves. After stirring at room temperature for 10 minutes, TPAP (0.1 g, 0.28 mmol) was added portionwise. The reaction mixture was stirred at room temperature for 3 hours, and then filtered through a silica gel plug. The filtrate was concentrated in vacuo to afford the title compound which was used directly at Step 8.

1. stirringThe reaction mixture was stirred at room temperature for 3 hours
2. filtrationfiltered through a silica gel plug
3. concentrationThe filtrate was concentrated in vacuo