Title:
NEW PRIMARY INTERMEDIATE FOR OXIDATION DYEING OF HAIR
Document Type and Number:
Japanese Patent JP2001253857
Kind Code:
A
Abstract:
To obtain a substitute, as a primary intermediate, more superior than p-phenylenediamine in a hairdye composition and hairdye system and more stable than 2-(2-hydroxyethyl)-p-phenylenediamine which is a readily producible intermediate in a free base shape.
This primary intermediate is 1-(2,5-diaminophenyl)ethanol. The method for producing the primary intermediate comprises (a) preparing 1-(2- amino-5-nitrophenol)ethanone, (b) reducing the 1-(2-amino-5-nitrophenol)ethanone to provide 1-(2-amino-5-nitrophenyl)ethanol, and (c) hydrogenating the 1-(2- amino-5-nitrophenyl)ethanol to convert the nitro group into an amino group.
Inventors:
PAN YUO-GUO
LIM MU-ILL
STASAITIS LINAS R
LIM MU-ILL
STASAITIS LINAS R
Application Number:
JP2001013198A
Publication Date:
September 18, 2001
Filing Date:
January 22, 2001
Export Citation:
Assignee:
BRISTOL MYERS SQUIBB CO
International Classes:
A61K8/41; A61Q5/10; C07B61/00; C07C213/00; A61K8/00; C07C213/02; C07C215/68; (IPC1-7): C07C215/68; A61K7/13; C07C213/02
Attorney, Agent or Firm:
Takehiko Saito (1 outside)
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