Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Chugai Pharmaceutical Co Ltd
Original Assignee
Chugai Pharmaceutical Co Ltd
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Filing date
Publication date
Application filed by Chugai Pharmaceutical Co LtdfiledCriticalChugai Pharmaceutical Co Ltd
Priority to JP12859577ApriorityCriticalpatent/JPS5463058A/en
Publication of JPS5463058ApublicationCriticalpatent/JPS5463058A/en
Pharmaceuticals Containing Other Organic And Inorganic Compounds
(AREA)
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Abstract
NEW MATERIAL:The title compound for formula.
USE: Useful as remedies for hyper-calcemia having an antivitamin D activity.
PROCESS: 1β-Hydroxyprovitamin D3, which is obtained from 1α-hydroxycholesterol 3-acetate as a starting material, is subjected to a series of reactions, i.e. B-ring opening and isomerization by irradiation with ultraviolet light to give the compound of formula.