PROCESS FOR THE PREPARATION OF VITAMIN A, INTERMEDIATES, AND PROCESS FOR THE PREPARATION OF THE INTERMEDIATES

Title:

PROCESS FOR THE PREPARATION OF VITAMIN A, INTERMEDIATES, AND PROCESS FOR THE PREPARATION OF THE INTERMEDIATES

Document Type and Number:

WIPO Patent Application WO/2000/059860

Kind Code:

A1

Abstract:

Dihalogenated derivatives represented by general formula (2); a process for the preparation of the derivatives; and a process for the preparation of vitamin A by the use of the derivative, wherein X is halogeno; and R?2¿ is a hydroxyl-protecting group.

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Inventors:

TAKAHASHI TOSHIYA (JP)
FURUTANI ATSUSHI (JP)
SEKO SHINZO (JP)

Application Number:

PCT/JP2000/002146

Publication Date:

October 12, 2000

Filing Date:

April 03, 2000

Export Citation:

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Assignee:

SUMITOMO CHEMICAL CO (JP)
TAKAHASHI TOSHIYA (JP)
FURUTANI ATSUSHI (JP)
SEKO SHINZO (JP)

International Classes:

C07C67/00; C07C67/287; C07C69/63; C07C403/06; C07C403/22; (IPC1-7): C07C69/63; C07C67/287; C07C403/06; C07C403/22

Foreign References:

EP0900785A2

1999-03-10

Other References:

OEHLSCHLAGER ALLAN C. ET AL.: "Syntheis of two macrolide pheromones of the rusty grain beetle, Cryptolestes ferrugineus (Stephens)", J. ORG. CHEM.,, vol. 48, no. 25, 1983, pages 5009 - 5017, XP002929635

Attorney, Agent or Firm:

Jinno, Naoyoshi (Limited Intellectual Property Dept. 5-33 Kitahama 4-chom, Chuo-ku Osaka-shi Osaka, JP)

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