Process for preparing vitamin D-lactones

Details Process for preparing vitamin D-lactones Process for preparing vitamin D-lactones

1981-01-26

1982-06-22

Roberts, Elbert L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2603971, 2603972, C07J 900, C07J 1700

Patent

active

043361935

ABSTRACT:
The invention provides methods for preparing the various isomeric forms of 25-hydroxyvitamin D.sub.3 -26,23-lactone utilizing cyanohydrin formation with readily prepared steroid materials followed by actinic radiation of the products and recovery of the desired 25-hydroxyvitamin D.sub.3 -26,23-lactone.
The invention also provides new intermediate compounds in their various isomeric forms derived during the process for preparing the said vitamin D.sub.3 lactones.
25-Hydroxyvitamin D.sub.3 -26,23-lactone is recognized as having vitamin D-like activity and is believed to play an important role in the regulation of calcium and phosphate levels in the animal and human organism. The present invention provides a convenient method for preparing the various isomeric forms of this compound.

REFERENCES:
patent: 3547911 (1970-12-01), Fried et al.
patent: 4134904 (1979-01-01), Kaiser
patent: 4183852 (1980-01-01), Kaiser

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