Title:
【発明の名称】シクロヘキサジエン誘導体
Document Type and Number:
Japanese Patent JPH0717661
Kind Code:
B2
Abstract:
A silyl-enol ether of the formula I wherein n stands for the number and X stands for a group or n stands for the number 1 and X stands for the 6,11-dimethylhexadeca-2,4,6,8,10,12,14-heptaene-2,15-diyl group, the symbols R1 have the same or different significances and denote alkyl groups, and the symbol R2 represents a trialkylsiloxy group -OSi(R1)3 or an ether group, is oxidized with percarboxylic acid and, if desired, the resulting alpha -siloxy ketone is hydrolyzed to an alpha -hydroxy ketone. This process is especially suitable for the manufacture of astaxanthin.
Inventors:
Kurt Bernhard
Robert Carle Miular
Roberto Sprithuitenburg
Robert Carle Miular
Roberto Sprithuitenburg
Application Number:
JP5410592A
Publication Date:
March 01, 1995
Filing Date:
February 06, 1992
Export Citation:
Assignee:
F. Hoffman-La Rochille Age
International Classes:
C07C403/00; C07C409/30; C07F7/04; C07F7/18; C07F9/54; (IPC1-7): C07F7/18
Attorney, Agent or Firm:
Heiyoshi Odashima
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