反应详情

To a stirred mixture of 3-(piperidin-4-ylmethoxy)-4-(2,2,2-trifluoroethoxy)-1,2-benzisoxazole (0.33 g, 1.0 mmol, EXAMPLE 2, Step 2) and methyl 1-formylcyclobutanecarboxylate (0.17 g, 1.2 mmol, J. Org. Chem. 1993, 58, 6843-6850) in dichloromethane (5 mL) was added sodium triacetoxyborohydride (0.42 g, 2.0 mmol) at room temperature. After being stirred at room temperature for 16 h, sat. aq. sodium hydrogencarbonate (20 mL) was added to the mixture. The mixture was extracted with dichloromethane (30 mL×2). The combined extract was dried over magnesium sulfate and concentrated in vacuo to give 0.46 g (quant.) of the title compound as a colorless oil.

1. extractionThe mixture was extracted with dichloromethane (30 mL×2)
2. extractionThe combined extract
3. dry with materialwas dried over magnesium sulfate
4. concentrationconcentrated in vacuo