反应详情

5-(3,4-Dichloro-benzylsulfanylmethyl)-6-hydroxy-3,4-dihydro-2H-naphthalen-1-one (256 mg, 0.69 mmol), (R)-2-imidazol-1-yl-1-phenyl-ethanol (144 mg, 0.75 mmol), and triphenylphosphine resin (1.46 g, loading 1.41 mmol/g) were combined in dry tetrahydrofuran (10 mL) and treated with diisopropyl azodicarboxylate (271 μL, 2.0 mmol). The resulting orange-brown heterogeneous mixture was allowed to stir at ambient temperature overnight. The spent triphenylphosphine resin was removed by filtration, washing sequentially with ethyl acetate, methanol, and chloroform. The filtrate was concentrated in vacuo and the crude material was purified by silica gel chromatography (hexanes/ethyl acetate/triethylamine 28:70:2) to give 280 mg (75%) of the desired product as a colorless solid: (LC-MS, APCI) m/z 553/555 [M+H]+.

1. customThe spent triphenylphosphine resin was removed by filtration
2. washwashing sequentially with ethyl acetate, methanol, and chloroform
3. concentrationThe filtrate was concentrated in vacuo
4. customthe crude material was purified by silica gel chromatography (hexanes/ethyl acetate/triethylamine 28:70:2)