Process for preparing 1.alpha.-hydroxyvitamin D compounds from 1

Details Process for preparing 1.alpha.-hydroxyvitamin D compounds from 1 Process for preparing 1.alpha.-hydroxyvitamin D compounds from 1

1979-09-10

1980-11-18

Roberts, Elbert L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07J 900

Patent

active

042344956

ABSTRACT:
A method for preparing 1.alpha.-hydroxyvitamin D compounds from 1.alpha.-hydroxy-3,5-cyclovitamin D compounds which comprises solvolyzing the 3,5-cyclovitamin D compound, exposing the solvolysis reaction products to actinic radiation in the presence of a photosensitizing agent and recovering the 1.alpha.-hydroxylated vitamin D compounds.
1.alpha.-hydroxylation is recognized as being essential to impart biological activity to vitamin D compounds and their derivatives. The present invention provides an efficient method for maximizing the yield of 1.alpha.-hydroxylated vitamin D compounds.

REFERENCES:
patent: WO79/00513 (1979-08-01), DeLuca et al.
Paaren et al., "Proc. Nat. Acad. Sci." (1978) 75 p. 2080.

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