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Title:
METHOD FOR PRODUCING CAPSANTHIN AND INTERMEDIATE
Document Type and Number:
Japanese Patent JP2003073386
Kind Code:
A
Abstract:

To provide a method for the production of capsanthin.

An epoxyaldehyde derivative easily synthesizable from (4R,6R)-4- hydroxy-2,2,6-trimethylcyclohexanone widely used as an optically active raw material for carotenoid synthesis is subjected to site- and stereo-specific ring- opening and rearrangement reaction to obtain cyclopentyl ketone expressed by formula (7). The cyclopentyl ketone is reacted with a Wittig salt in the presence of a base and the obtained acetal is hydrolyzed to obtain apocarotenal. Capsanthin is produced by reacting the apocarotenal with a Wittig salt in the presence of a base. The invention further relates to an intermediate of the above reaction.


Inventors:
ITOU MASAYOSHI
YAMANO YUMIKO
Application Number:
JP2001000266883
Publication Date:
March 12, 2003
Filing Date:
September 04, 2001
Export Citation:
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Assignee:
SUMITOMO CHEMICAL CO
International Classes:
C07C45/68; C07B53/00; C07B61/00; C07C49/355; C07C67/343; C07C69/732; C07F7/18; C07F7/22; (IPC1-7): C07F7/22; C07C45/68; C07C49/355; C07C67/343; C07C69/732; C07F7/18
Attorney, Agent or Firm:
Takashi Kuboyama (1 person outside)