Title:
FLUORESCENT RED AZATHIOXANTHENE COLORANT COMPOUND
Document Type and Number:
Japanese Patent JP3704872
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a fluorescent red colorant compd. exhibiting a high luminance and a good fastness by introducing a cycloalkyl group into a fluorescent red azathioxanthene colorant compd.
SOLUTION: This compd. is represented by formula I wherein A is a cycloalkyl group, a cyclohexyl group being the most suitable. A compd. represented by formula IV is obtd. by reacting a compd. represented by formula 11 with an alkylating agent (e.g. a tosyl ester of a cycloalkanol) in the presence of a deoxidizing agent in an inert solvent (e.g. N,N-dimethylformamide). A compd. represented by formula V is obtd. by reacting a compd. represented by formula IV with o-aminophenol in the presence of a deoxidizing agent in an inert solvent. The objective compd. represented by formula I is obtd. by diazotizing a compd. represented by formula V in water or in a suitable org. solvent and heating the resultant diazonium salt in the presence of a copper catalyst.
Inventors:
Yukichi Murata
Application Number:
JP6978297A
Publication Date:
October 12, 2005
Filing Date:
March 24, 1997
Export Citation:
Assignee:
Mitsubishi Chemical Corporation
International Classes:
C07D495/04; C09B5/00; C09B5/24; C09B57/14; (IPC1-7): C09B5/00
Domestic Patent References:
| JP50101425A |
Attorney, Agent or Firm:
Tsuyoshi Shigeno
Previous Patent: COMPUTER FAULT INSPECTION INFORMATION DEVICE
Next Patent: BROMINATED AZATHIOXANTHENE COMPOUND AND PRODUCTION THEREOF
Next Patent: BROMINATED AZATHIOXANTHENE COMPOUND AND PRODUCTION THEREOF