反应详情

To a solution of Compound 158 (47 mg, 0.1 mmol), morpholine-3,5-dione (16 mg, 0.14 mmol) and triphenylphosphine (37 mg, 0.14 mmol) in THF (5 ml) was added diethyl azodicarboxylate solution (40% in toluene, 0.1 ml, 0.23 mmol) at RT. The reaction solution was stirred at the same temperature for 18 h and concentrated in vacuo. The residue was purified by chromatography (petroleum ether/ethyl acetate 1:1) to furnish the title compound, which was impure. The product was further purified by preparative TLC (petroleum ether/ethyl acetate 1:1) to give the pure title compound as yellow oil.

1. concentrationconcentrated in vacuo
2. customThe residue was purified by chromatography (petroleum ether/ethyl acetate 1:1)