Water → HCID 69804252, compound

Participants

Reaction Steps

The product from step (a) (529 mg, 1.57 mmol) was dissolved in anhydrous tetrahydrofuran (80 ml), triphenylphosphine (1.235 g, 4.71 mmol) added and the reaction mixture stirred for 1 h at room temperature. Water (5 ml) was added and the reaction stirred for 64 h. Water (100 ml) was added and the reaction extracted with ethyl acetate (4×70 ml). The combined organic extracts were washed with water (3×25 ml), dried (sodium sulphate) and evaporated in vacuo. The residue was chromatographed on flash silica, eluting with 5% 7N ammonia in methanol in dichloromethane, and the product dissolved in methanol and treated with one equivalent of oxalic acid. The mixture was stirred for 10 minutes then the solvent removed in vacuo and the solid residue triturated with ethyl acetate. The white solid was filtered off and dried to give the title compound (380 mg, 60%).

Provenance & Evidence