Patent · US Expired

2-hydrazono-4,6-dinitrobenzthiazolones useful to form dyestuffs and as color formers for detecting peroxide

US4962040A · kind A · utility

4Cited by
2References
1Claims
0Family size

Assignee

Inventors

Key dates

Filing dateAug 10, 1989
Grant dateOct 9, 1990
Priority date—
Expiry dateAug 10, 2009

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY10T436/206664
  • WIPO fieldBiotechnology
  • WIPO sectorChemistry

Abstract

2-Hydrazono-4,6-dinitrobenzthiazolones of the formula ##STR1## in which X.sub.1 represents hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -hydroxyalkyl, C.sub.1 -C.sub.4 -sulphoalkyl or C.sub.1 -C.sub.4 -sulphatoalkyl, and PA0 X.sub.2 represents hydrogen or --SO.sub.2 X.sub.3, where PA0 X.sub.3 may represent hydrogen, C.sub.1 -C.sub.8 -alkyl or optionally substituted aryl and PA0 X.sub.1 also represents a double bond between the cyclic nitrogen atom and the carbon atom 2 according to the formula II below: ##STR2## where X.sub.2 has the meaning specified under the above formula. These hydrazones may be employed in the preparation of azo dyestuffs and as color formers for detecting of biological substances, and in the determination of H.sub.2 O.sub.2.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.