反应详情

Methanesulfonyl chloride (0.083 mL) was added to a solution of diisopropylethylamine (0.279 mL) and the product from step (iv) (0.246 g) in THF (10 mL). The mixture was stirred at RT for 3 h and additional diisopropylethylamine (0.14 mL) and methanesulfonyl chloride (0.042 mL) was added. The mixture was stirred at RT for 2 h, diluted with water and sat. sodium hydrogen dicarbonate and extracted with EtOAc. The combined organic layer was dried and concentrated under reduced pressure to afford the crude product (300 mg) as a pale yellow oil, which was used for the next reaction without further purification; LC-MS: m/z 539.

1. stirringThe mixture was stirred at RT for 2 h
2. extractionextracted with EtOAc
3. customThe combined organic layer was dried
4. concentrationconcentrated under reduced pressure