反应详情

To a solution of methyl (1S,5R)-6-oxabicyclo[3.1.0]hexane-3-carboxylate (300 mg, 2.110 mmol) in 3 ml of dichloroethane in a Teflon tube was added hydrogen fluoride-pyridine (0.190 ml, 2.110 mmol and allowed to stir at ambient for 6 hrs. Carefully poured onto 5 ml ice/NaHCO3 and extracted with three portions of DCM. Dried over sodium sulfate followed by Silica gel chromatgraphy with 30-50% Acetone-hexane to give title compound. 1H NMR (500 MHz, CDCl3) δ 1.96-2.03 (m, 1H), δ 2.12-2.32 (m, 3H), δ 2.38-2.52 (m, 1H), δ 3.12 (m, 1H), δ 3.72 (s, 3H), δ 4.34 (m, 1H), δ 4.86 (d of m, J=51.5 Hz, 1H)

1. extractionextracted with three portions of DCM
2. dry with materialDried over sodium sulfate