PROCESS FOR THE PREPARATION OF 1-HYDROXYLATED VITAMIN D COMPOUNDS

摘要

Vitamin D derivs. (III; Y = H, OH; R = IV; R1,R2,R3,R5 are same or not, H, halogen, hydroxy; R4 = H, halogen, Me or Et group) were prepd. by oxidn. of I with selenite esters. Thus, treatment of trans-vitamin D3 with S2O2 and NaIO4 in MeOH gave 1α,3β-dihydroxy-trans-vitamin D3, 1α,3β-dihydroxycis-vitamin D3, 1β,3β-dihydroxy-cis-vitamin D3, and 1β,3β-dihydroxy-trans-vitamin D3.