Patent · US Expired

Pyrazolidinium ylides

US4767871A · kind A · utility

3Cited by
1References
17Claims
0Family size

Assignee

Inventors

Key dates

Filing dateApr 30, 1987
Grant dateAug 30, 1988
Priority date—
Expiry dateApr 30, 2007

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC07D231/08
  • WIPO fieldOrganic fine chemistry
  • WIPO sectorChemistry

Abstract

4-(Protected amino)-3-oxo-1-(substituted and unsubstituted methylene)-1,2-pyrazolidinium ylides are intermediates to 7-substituted bicyclic pyrazolidione antimicrobials.

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