反应详情

(3R,3aR,6aS)-Hexahydrofuro[2,3-b]furan-3-ol (125 mg) obtained in Example 25 was dissolved in toluene (2 mL). Benzoic acid (214 mg), a 40 wt % solution (705 mg) of diethyl azodicarboxylate in toluene, and triphenylphosphine (416 mg) were added. The mixture was stirred overnight. After the reaction, 10% of the solution was purified by flash chromatography to give the title compound (12 mg) (88% ee), which was almost a pure anti-form.

1. customwas purified by flash chromatography