【発明の名称】ステロイド誘導体およびその製造方法

Title:

【発明の名称】ステロイド誘導体およびその製造方法

Document Type and Number:

Japanese Patent JPH0755960

Kind Code:

B2

Abstract:

New processes for preparing new steroid derivatives including ergosta-1,5,7,22-tetraen-3 beta -ol, 1 alpha -hydroxy-ergosteryl diacetate, etc. which are useful intermediates in the synthesis of 1 alpha -hydroxy vitamin D2. The processes include the new steps of reacting ergosta-1,4,6,22-tetraen-3-one with isopropenyl acetate in the presence of an acid catalyst followed by reduction to ergosta-1,5,7,22-tetraen-3 beta -ol. The overall yield leading to 1 alpha -hydroxy vitamin D2 is dramatically increased.

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Inventors:

Yoji Tachibana

Application Number:

JP27095186A

Publication Date:

June 14, 1995

Filing Date:

November 14, 1986

Export Citation:

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Assignee:

NISSHIN FLOUR MILLING CO.,LTD.

International Classes:

A61K31/575; A61P3/02; A61P3/14; C07C401/00; C07J9/00; C07J43/00; C07J51/00; C07J71/00; C07J75/00; (IPC1-7): C07J9/00; C07J75/00

Other References:

【文献】米国特許3907843(US,A)
【文献】米国特許4287129(US,A)

Attorney, Agent or Firm:

Chika Takagi (2 outside)

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