中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (2R,3S,4R)-6-octadecylsulfanyl-3,4-bis(phenylmethoxy)-2-(phenylmethoxymethyl)oxane | 256390-59-7 | C45H66O4S | 703.083 |
The anomeric effect of the sulfone group in tetrahydropyrans has been determined. The value is >2 kcal mol1, which is larger than the A-value of a methyl group but less than the A-value of the sulfone in a tetrahydropyran. Hence, in an unsubstituted tetrahydropyranyl sulfone, the equatorial conformer predominates, whereas in a properly substituted methyltetrahydropyranyl sulfone, an axial sulfone is preferred over an axial methyl group.Key words: sulfone, tetrahydropyran, anomeric effect.