反应详情

Pyridiniumchlorochromate (1.67 g, 7.77 mmol) was added to N-(5-chloro-2-(hydroxymethyl)phenyl)pivalamide (1.34 g, 5.55 mmol) in CH2Cl2 (100 mL) at 0° C. 5 min later, the reaction mixture was stirred at room temperature for 3 hrs. Then it was passed through a thin silica gel pad with CH2Cl2 (100 mL), concentrated on rotary vacuum and purified on flash chromatography eluting with 20˜40% EtOAc/hexanes (800 mL) to afford the expected product as a white solid (937 mg, 70% yield). 1H NMR (400 MHz, CHLOROFORM-D) δ ppm 1.28-1.34 (s, 9 H), 7.15 (dd, J=8.31, 2.01 Hz, 1 H), 7.53-7.59 (m, 1 H), 8.87 (d, J=2.01 Hz, 1 H), 9.84-9.88 (m, 1 H), 11.42 (s, 1 H); Mass spec. 240.07 (MH+), Calc. for C12H14ClNO2 239.07.

1. concentrationconcentrated on rotary vacuum
2. custompurified on flash chromatography
3. washeluting with 20˜40% EtOAc/hexanes (800 mL)