反应详情

0.6 ml of acetic anhydride and 4-dimethylaminopyridine as catalyst are added, in the presence of 0.3 ml of triethylamine, to 930 g of the compound of Example 4 dissolved in 50 ml of methylene chloride. After stirring for 1 hour at room temperature, a large excess of methanol is added and the reaction medium is then evaporated under vacuum.

1. customthe reaction medium is then evaporated under vacuum