Oxygen → HCID 86628871, compound

Participants

Reaction Steps

Following the general procedure for the preparation of aldehydes from alkenes of Description 11, (3S)-3-[(4-methoxyphenyl)methoxy]-2,2-dimethylpent-4-enyl (3-chloropropyl)sulfonate (13a) (3.0 g, 7.7 mmol) dissolved in 100 mL of dichloromethane (DCM) was treated with a mixture of oxygen and ozone (O2/O3). Upon completion of the reaction, 2 mL (1.69 g, 27.2 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 2.0 g (66% yield) of the title compound (13b) as a colorless oil. Rf=0.49 (EtOAc/Hxn=1:2). 1H NMR (400 MHz, CDCl3): δ=1.08 (s, 6H), 2.27-2.33 (m, 2H), 3.24-3.28 (m, 2H), 3.53 (d, J=2.4 Hz, 1H), 3.65-3.68 (m, 2H), 3.82 (s, 3H), 4.00 (d, J=9.2 Hz, 1H), 4.13 (d, J=9.2 Hz, 1H), 4.44 (d, J=11.2 Hz, 1H), 4.60 (d, J=11.2 Hz, 1H), 6.88 (d, J=8.4 Hz, 2H), 7.26 (d, J=8.4 Hz, 2H), 9.69 (d, J=2.4 Hz, 1H) ppm. MS (ESI) m/z 415.11 (M+Na)+. The analytical data was consistent with the proposed structure.

Provenance & Evidence