反应详情

To a solution of 8.2 g of bis(1-methoxy-2,2,6,6-tetramethylpiperidin-4-yl) hydrazine-1,2-dicarboxylate, as prepared in Example 1, in 100 mL of methylene chloride is added 6.3 g of iodobenzene diacetate in one portion at room temperature. After stirring at room temperature for 50 minutes, the solution is washed with a 10% solution of sodium carbonate and then with brine, and dried over anhydrous magnesium sulfate. The dried solution is then evaporated to leave 9.3 g of the desired product. Recrystallization of the crude product from acetonitrile affords 6.5 g of the title compound; mp 145°-147° C.

1. washthe solution is washed with a 10% solution of sodium carbonate
2. dry with materialwith brine, and dried over anhydrous magnesium sulfate
3. customThe dried solution is then evaporated