The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 15, 1994
Filed:
Sep. 30, 1992
Applicant:
Inventors:
Assignee:
Sumitomo Chemical Company Limited, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ; C07D / ; C07D / ;
U.S. Cl.
CPC ...
549299 ; 549 50 ; 549 51 ; 549 52 ; 549 57 ; 549 58 ; 549 60 ; 540596 ; 546197 ; 546270 ; 544 60 ; 544147 ; 544148 ; 544180 ; 544212 ; 544216 ; 544375 ; 544378 ; 548128 ; 548129 ; 548159 ; 548186 ; 548193 ; 548194 ; 548200 ; 548203 ; 548225 ; 548228 ; 548229 ; 548221 ; 548222 ; 548217 ; 548233 ; 548235 ; 548526 ; 5483117 ; 5483051 ; 5483615 ; 5483621 ; 5483625 ; 5483644 ;
Abstract
A benzodifuranone compounds of the formula, ##STR1## wherein R.sup.1 and R.sup.2 are each independently a naphthyl group or an unsubstituted or substituted phenyl group, which is useful for dyeing or printing hydrophobic fiber materials, is prepared in high purity and high yield by allowing benzofuran compounds of the formula, ##STR2## wherein R.sup.1 is as defined above, to react with acetonitrile compounds of the formula, ##STR3## wherein R.sup.2 is as defined above, and then carrying out an oxidation reaction to give the benzodifuranone compound.