Patent · US Expired

1-Chlorosulphonyl-2,3,4,10-tetrahydro-1H-chromeno[3,4-c]azet-2-one

US4431590A · kind A · utility

1Cited by
4References
1Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJul 16, 1982
Grant dateFeb 14, 1984
Priority date—
Expiry dateJul 16, 2002

Classification

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

Abstract

A process is disclosed for producing imidazolidone intermediates from 2H-chromene. The intermediates are useful for synthesizing biotin.

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