Homologated vitamin D.sub.2 compounds and the corresponding 1.al

Details Homologated vitamin D.sub.2 compounds and the corresponding 1.al Homologated vitamin D.sub.2 compounds and the corresponding 1.al

1991-02-13

1993-11-09

Mars, Howard T.

Drug, bio-affecting and body treating compositions

Designated organic active ingredient containing

9,10-seco- cyclopentanohydrophenanthrene ring system doai

552653, C07J17200

Patent

active

052602907

ABSTRACT:
The invention provides new 24, 26, and/or 27 homologated vitamin D.sub.2 compounds, such as 26,27-dihomo-1.alpha.-hydroxyvitamin D.sub.2, 26,27-dihomo-1.alpha.-hydroxy-24-epi-vitamin D.sub.2, 26,27-dihomo-1.alpha.,25-dihydroxy-24-epi-vitamin D.sub.2 and certain hydroxy-protected derivatives thereof. The new epi compounds in particular exhibit a distinctive activity pattern comprising high potency in stimulating intestinal calcium transport and little or no activity in inducing bone calcium mobilization or the differentiation of undifferentiated cells in culture, thereby evincing utility in the treatment of diseases characterized by loss of bone mass. In contrast, the natural form exhibits no activity in either mobilizing calcium from bone or stimulating intestinal calcium transport. A process for preparing such compounds is also disclosed.

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