Title:
1-アミノ-4-ヒドロキシアントラキノン類の製造方法
Document Type and Number:
Japanese Patent JP4176411
Kind Code:
B2
Abstract:
1-Amino-4-hydroxyanthraquinones are prepared by reacting 1,4-dihydroxyanthraquinone with aliphatic or aromatic amine in the presence of N-methyl-2-pyrrolidone. Preparation of 1-amino-4-hydroxyanthraquinones of formula (I) involves reacting 1,4-dihydroxyanthraquinone, optionally as a mixture with 2,3-dihydro-1,4-dihydroanthraquinone, with aliphatic or aromatic amine in the presence of N-methyl-2-pyrrolidone. R = aliphatic or aromatic radical. An Independent claim is also included for a method for mass coloration of plastics comprising introducing into a plastic the compound prepared above.
Inventors:
Christoph Thebes
Joseph-Balter Schutavitz
Joseph-Balter Schutavitz
Application Number:
JP2002225909A
Publication Date:
November 05, 2008
Filing Date:
August 02, 2002
Export Citation:
Assignee:
LANXESS Deutschland Gamebecher
International Classes:
C07C221/00; C07B61/00; C07C225/36; C07C231/12; C07C233/43; C09B1/514
Domestic Patent References:
| JP61095073A | ||||
| JP63235372A | ||||
| JP55160751A |
Attorney, Agent or Firm:
Patent business corporation Odashima patent office