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Title:
PROCESS FOR PRODUCTION OF STEROIDS
Document Type and Number:
WIPO Patent Application WO/2007/080951
Kind Code:
A1
Abstract:
The invention provides a novel process for the production of steroids, namely, a process for the production of 5β-3,7 -dioxocholanoic acid or ester derivatives thereof which comprises using as the raw material a sterol having double bonds at the 5- and 24-positions selected from among cholesta -5,7,24-trien-3β-ol, ergosta-5,7,24(28)-trien-3β-ol, desmo- sterol, fucosterol, and ergosta-5,24(28)-dien-3β-ol and conducting the following four steps: (I) the step of conducting the oxidation of 3-position hydroxyl and the isomerization of double bond from the 5-position to the 4-position (II) the step of converting the group at the 24-position into carboxyl or a carboxylic ester group by oxidative cleavage of the side chain, (III) the step of introducing an oxygen-containing functional group to the 7-position, and (IV) the step of constructing 5β-configuration by reductive saturation of the 4-position double bond.

Inventors:
TAKEHARA, Jun (INC. 1000, Kamoshida-cho, Aoba-ku, Yokohama-sh, Kanagawa 02, 2278502, JP)
竹原 潤 (〒02 神奈川県横浜市青葉区鴨志田町1000番地 株式会社三菱化学科学技術研究センター内 Kanagawa, 2278502, JP)
FUJIWARA, Naoya (INC. 1000, Kamoshida-cho, Aoba-ku, Yokohama-sh, Kanagawa 02, 2278502, JP)
藤原 尚哉 (〒02 神奈川県横浜市青葉区鴨志田町1000番地 株式会社三菱化学科学技術研究センター内 Kanagawa, 2278502, JP)
ENDOU, Kyouko (INC. 1000, Kamoshida-cho, Aoba-ku, Yokohama-sh, Kanagawa 02, 2278502, JP)
遠藤 恭子 (〒02 神奈川県横浜市青葉区鴨志田町1000番地 株式会社三菱化学科学技術研究センター内 Kanagawa, 2278502, JP)
Application Number:
JP2007/050297
Publication Date:
July 19, 2007
Filing Date:
January 12, 2007
Export Citation:
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Assignee:
MITSUBISHI CHEMICAL CORPORATION (14-1, Shiba 4-chome Minato-ku Tokyo, 14, 1080014, JP)
三菱化学株式会社 (〒14 東京都港区芝四丁目14番1号 Tokyo, 1080014, JP)
TAKEHARA, Jun (INC. 1000, Kamoshida-cho, Aoba-ku, Yokohama-sh, Kanagawa 02, 2278502, JP)
竹原 潤 (〒02 神奈川県横浜市青葉区鴨志田町1000番地 株式会社三菱化学科学技術研究センター内 Kanagawa, 2278502, JP)
FUJIWARA, Naoya (INC. 1000, Kamoshida-cho, Aoba-ku, Yokohama-sh, Kanagawa 02, 2278502, JP)
藤原 尚哉 (〒02 神奈川県横浜市青葉区鴨志田町1000番地 株式会社三菱化学科学技術研究センター内 Kanagawa, 2278502, JP)
ENDOU, Kyouko (INC. 1000, Kamoshida-cho, Aoba-ku, Yokohama-sh, Kanagawa 02, 2278502, JP)
International Classes:
C07J9/00; B01J21/08; B01J23/44; C07J1/00; C07J17/00; C07J41/00; C07J9/00; B01J21/00; B01J23/44; C07J1/00; C07J17/00; C07J41/00
Attorney, Agent or Firm:
SIKs & Co. (8th Floor, Kyobashi-Nisshoku Bldg. 8-7, Kyobashi 1-chome, Chuo-k, Tokyo 31, 1040031, JP)
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