反应详情

At 100° C., 500 mg (1.7 mmol) of the compound from Example 11A, 323 mg (1.7 mmol) of the compound from Example 8A and 58 mg (0.3 mmol) of p-toluenesulfonic acid are stirred in 2 ml of ethanol for 16 h. After cooling to RT, 0.5 ml of a 4 N solution of hydrogen chloride in dioxane is added, and the mixture is stirred at RT for 30 min. The precipitate is filtered off, washed first with ethanol and then with diethyl ether and dried under reduced pressure.

1. filtrationThe precipitate is filtered off
2. washwashed first with ethanol
3. dry with materialwith diethyl ether and dried under reduced pressure