Patent · US Expired

4-Hydroxy-3-sulfonyl-quinolin-2(1H)-ones

US4127574A · kind A · utility

5Cited by
1References
22Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMar 1, 1976
Grant dateNov 28, 1978
Priority date—
Expiry dateMar 1, 1996

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC07D215/36
  • WIPO fieldOrganic fine chemistry
  • WIPO sectorChemistry

Abstract

Anti-allergic 4-hydroxy-3-sulfonyl-quinolin-2(1H)-ones are prepared by reacting an isatoic anhydride with the carbanion resulting from the treatment of sulfonyl acetic acid alkyl esters with a proton abstracting agent.

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