The object of the present invention is to synthesize vitamin D derivatives in which the
3
-position is substituted with methyl and the steric configuration at the
20
-position is epimerized.
The present invention provides vitamin D derivatives of Formula (
1
):
1
wherein R is straight or branched alkyl optionally substituted with hydroxy.
An object of the present invention is to synthesize a novel vitamin D derivative having a methyl group at the 3-position.
The present invention provides vitamin D derivatives represented by the general formula (1):
wherein X represents -CH2-, -O- or -S-; and R1 represents a saturated or unsaturated aliphatic C1-C15 hydrocarbon group which may be substituted by 1 to 3 hydroxyl groups or protected hydroxyl groups.