Method of production of vitamin-D

Details Method of production of vitamin-D Method of production of vitamin-D

1982-03-15

1983-06-14

Roberts, Elbert L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07J 1700, C07J 900

Patent

active

043882420

ABSTRACT:
A method of upgrading a product containing a minor proportion of pre-vitamin d.sub.2 or pre-vitamin d.sub.3 and a major proportion of tachysterol comprising irradiating the product with laser light in the wavelength range 330-360 nanometers to obtain a product containing approximately 95% pre-vitamin -D.sub.2 or pre-vitamin -D.sub.3, and heating this product to convert the pre-vitamin -D.sub.2 or pre-vitamin -D.sub.3 to vitamin -D.sub.2 or vitamin -D.sub.3.

REFERENCES:
patent: 4021423 (1977-05-01), Baggiolini et al.
Chem. Abstracts publication vol. 93 (1980), Pars. 46,993Z.

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