Sodium Bicarbonate → Methyl 1-{[4-({[4-(2,2,2-trifluoroethoxy)-1,2-benzisoxazol-3-yl]oxy}methyl)piperidin-1-yl]methyl}-cyclobutanecarboxylate

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Reaction Steps

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.

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