The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 07, 2005
Filed:
Dec. 05, 2003
Tadao Michishita, Tokyo, JP;
Satoshi Watanabe, Tokyo, JP;
Masahiro Katoh, Tokyo, JP;
Tetsuhiro Mikami, Tokyo, JP;
Kaname Tsuzaki, Tokyo, JP;
Koji Oikawa, Tokyo, JP;
Makoto Uehara, Tokyo, JP;
Tadao Michishita, Tokyo, JP;
Satoshi Watanabe, Tokyo, JP;
Masahiro Katoh, Tokyo, JP;
Tetsuhiro Mikami, Tokyo, JP;
Kaname Tsuzaki, Tokyo, JP;
Koji Oikawa, Tokyo, JP;
Makoto Uehara, Tokyo, JP;
Chugai Seiyaku Kabushiki Kaisha, Tokyo, JP;
Abstract
A process for preparing a vitamin D derivative including providing an ultraviolet irradiation apparatus for photochemical reactions, which has an ultraviolet radiation-emitting lamp, an optical system which receives light from the ultraviolet radiation-emitting lamp and emits ultraviolet rays having a specific wavelength, and a quartz rod which receives the ultraviolet rays having the specific wavelength from the optical system and emits the ultraviolet rays, irradiating a solution of a provitamin D derivative with the ultraviolet rays emitted from the quartz rod to cause a photochemical reaction to the provitamin D derivative solution, thereby forming a previtamin D derivative, and subjecting the previtamin D derivative to a thermal isomerization reaction to prepare the vitamin D derivative.