Patent · US Expired

Preparation of dihydro-4,4-dimethylfuran-2,3-dione

US4503238A · kind A · utility

0Cited by

1References

6Claims

0Family size

Assignee

BASF SE

Inventors

Joachim Paust · Schifferstadt, DE
Hartmut Leininger · Neustadt, DE

Key dates

Filing date	Nov 16, 1983
Grant date	Mar 5, 1985
Priority date	—
Expiry date	Nov 16, 2003

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D307/60
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Dihydro-4,4-dimethylfuran-2,3-dione is prepared by oxidation of racemic dihydro-3-hydroxy-4,4-dimethyl-2(3H)-furanone by a process in which the oxidation is carried out by gradually adding powdered calcium oxide to a solution of racemic dihydro-3-hydroxy-4,4-dimethyl-2(3H)-furanone and chlorine in the inert organic solvent.

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