反应详情

Trimethylsilyl chloride (9.2 ml, 72.46 mmol) was added to a solution of 4-piperidin-4-yl-butyric acid (1) (5.00 g, 24.15 mmol) dissolved in anhydrous methanol (100 mL). The resulting solution was stirred at room temperature for 48 hours, and concentrated under vacuum to complete dryness to give 2 (4.50 g, 97%) as a white solid, which was used directly in the next step without further purification: 1H NMR (300 MHz, CD3OD) δ 1.20-1.46 (m, 4H), 1.52-1.74 (m, 3H), 1.96 (d, 2H), 2.35 (t, 2H), 2.96 (t, 2H), 3.36 (t, 2H), 3.68 (s, 3H); ESI MS m/z 186 [C10H19NO2+H]+.

1. concentrationconcentrated under vacuum