反应详情

To a solution of alcohol 14 (190 mg, 0.43 mmol) and phenol 18 (102 mg, 0.56 mmol) in THF (6 mL) at −10° C. was added PBu3 (0.15 mL, 0.65 mmol) followed by tetramethylazodicarboxamide (TMAD) (111 mg, 0.65 mmol). The reaction mixture was slowly warmed to room temperature and was stirred for 22 hours. Solvent was evaporated under reduced pressure and purified by flash column chromatography on silica gel using [hexane/EtOAc (80:20)→hexane/EtOAc (50:50)] as eluent to isolate product 19b (130 mg, 0.22 mmol, 50%) as a clear oil.

1. customSolvent was evaporated under reduced pressure
2. custompurified by flash column chromatography on silica gel using [hexane/EtOAc (80:20)→hexane/EtOAc (50:50)] as eluent