Methods for preparation and use of 1.alpha.,24(S)-Dihydroxy vita

Details Methods for preparation and use of 1.alpha.,24(S)-Dihydroxy vita Methods for preparation and use of 1.alpha.,24(S)-Dihydroxy vita

1995-06-07

2000-12-26

Badio, Barbara

Drug, bio-affecting and body treating compositions

Designated organic active ingredient containing

9,10-seco- cyclopentanohydrophenanthrene ring system doai

552653, A61K 3159, C07C40100

Patent

active

061660000

ABSTRACT:
1.alpha.,24(S)-Dihydroxy vitamin D.sub.2 which is useful as an active compound of pharmaceutical compositions for the treatment of disorders of calcium metabolism and for various skin disorders. The invention also includes preparation of synthetic 1.alpha.,24(S)-dihydroxy vitamin D.sub.2 starting from ergosterol which is converted in six steps to 24-hydroxyergosterol. 24-Hydroxyergosterol is irradiated and thermally converted to 24-hydroxy vitamin D.sub.2 which is converted in six steps to 1.alpha.,24(S)-dihydroxy vitamin D.sub.2. The syntheses also produced novel intermediates.

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