Patent · US Expired

Spironolactone process

US4211701A · kind A · utility

2Cited by
3References
40Claims
0Family size

Assignee

Inventor

Key dates

Filing dateApr 13, 1979
Grant dateJul 8, 1980
Priority date—
Expiry dateApr 13, 1999

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC07J31/003
  • WIPO fieldOrganic fine chemistry
  • WIPO sectorChemistry

Abstract

Spironolactone (VIII) is produced from ethisterone (I) by formation of the lactone (IV), a halo lactone (VI) and a .DELTA.4,6-lactone (VII).

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