7-dehydrocholesterol-hemimethanolate

A technology for dehydrocholesterol and methanolate, applied in the direction of steroids, organic chemistry, organic chemistry methods, etc., can solve problems such as prolongation
CN113015739APending Publication Date: 2021-06-22DSM IP ASSETS BV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
DSM IP ASSETS BV
Publication Date
2021-06-22

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Abstract

The present invention relates to 7-dehydrocholesterol-hemimethanolate. It has been found that the formation of 7-dehydrocholesterol-hemimethanolate offers an efficient method of increasing the storage stability of 7-dehydrocholesterol, respectively of decreasing the degradation upon storage of 7-dehydrocholesterol.
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Description

technical field

[0001] The present invention relates to the field of 7-dehydrocholesterol. Background technique

[0002] 7-Dehydrocholesterol is a key intermediate used in the synthesis of cholecalciferol (=vitamin D3).

[0003] However, 7-dehydrocholesterol has limited storage stability and degrades during prolonged storage. Contents of the invention

[0004] Therefore, the problem to be solved by the present invention is to increase the storage stability of 7-dehydrocholesterol, or to reduce the degradation of 7-dehydrocholesterol during storage. Surprisingly, it has been found that 7-dehydrocholesterol-hemimethanol exhibits polymorphism. 7-Dehydrocholesterol-hemicarbinolate offers a solution to this problem. 7-Dehydrocholesterol-hemimethanol can be readily formed from 7-dehydrocholesterol. Furthermore, 7-dehydrocholesterol can be easily regenerated in high yield from 7-dehydrocholesterol-hemimethanolate. It has been found that 7-dehydrocholesterol-hemimethanol exhi...

Claims

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