Patent · US Expired

Process for preparing Benzoxepino- or Benzthiapino[4,3-b]pyrrole-2-acetic acids

US4380645A · kind A · utility

1Cited by
1References
10Claims
0Family size

Assignee

Inventors

Key dates

Filing dateDec 11, 1981
Grant dateApr 19, 1983
Priority date—
Expiry dateDec 11, 2001

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC07D495/04
  • WIPO fieldOrganic fine chemistry
  • WIPO sectorChemistry

Abstract

Improved yields of Benzoxepino- or Benzthiapino[4,3-b]pyrrole-2-acetic acids have been achieved from processes based on modifications performed on a pyrrole carboxylic ester rather than on a pyrrole-.alpha.-oxoacetate.

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