反应详情

Following the general procedure for the preparation of aldehydes from alkenes of Description 11, (3R/S)-2,2-dimethyl-3-(phenylmethoxy)pent-4-enyl (3-chloropropyl]sulfonate (12a) (10.0 g, 27.7 mmol) dissolved in 150 mL of dichloromethane (DCM) was treated with a mixture of oxygen and ozone (O2/O3). Upon completion of the reaction, 4.0 mL (3.4 g, 55 mmol) of dimethyl sulfide (DMS) was added. After work-up, the crude material was purified by silica gel column chromatography using a mixture of ethyl acetate (EtOAc) and hexane (Hxn) (EtOAc/Hxn=1:2) as eluent to provide 7.6 g (76% yield) of the title compound (12b) as a colorless oil. The analytical data was consistent with the proposed structure and the data obtained for the enantiopure compound (11b).

1. additionwas added
2. customAfter work-up, the crude material was purified by silica gel column chromatography
3. additiona mixture of ethyl acetate (EtOAc) and hexane (Hxn) (EtOAc/Hxn=1:2) as eluent