中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (R)-p-tolyl vinyl sulfoxide | 54828-68-1 | C9H10OS | 166.244 |
(R)-(+)-甲基对甲苯砜 | (R)-methyl p-tolyl sulfoxide | 1519-39-7 | C8H10OS | 154.233 |
Enantiomerically enriched α,β-unsaturated sulfinate esters of ()-cholesterol undergo stereospecific substitutions at sulfur when treated in benzene at 6°C with Grignard reagents. Sulfoxides with ees of 8599.5% are obtained when enantiopure sulfinates are used. The substitution reactions proceed with inversion of sulfur configuration. Enantiomerically pure cholesteryl (E)-2-carbomethoxyethenesulfinate is not a suitable reactant under the Grignard reaction conditions. It is suggested that the ester group induces unwanted reactions significantly lowering both the yield and sulfur stereogenicity.Key words: sulfinate, sulfoxide, Grignard reagents, stereospecific, unsaturated.