Patent · US Active

Process for preparing 2,4-dioxotetrahydrofuran-3-carboxylates

US8318955B2 · kind B2 · utility

2Cited by

0References

15Claims

0Family size

Assignee

BAYER CROPSCIENCE AKTIENGESELLSCHAFT · DE

Inventors

Norbert Lui · Odenthal, DE
Jens-Dietmar Heinrich · Burscheid, DE
Christian Funke · Leichlingen, DE

Key dates

Filing date	Aug 11, 2010
Grant date	Nov 27, 2012
Priority date	—
Expiry date	Jan 19, 2031

Classification

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

Abstract

Process for preparing 2,4-dioxotetrahydrofuran-3-carboxylates of the formula (I) and/or (I′)comprising the reaction of a haloacetyl chloride compound of the formula (II)with a malonic ester of the formula (III)in which Hal, R1 and R2 have the definitions stated in the application, in the presence of a suitable base and optionally in the presence of a solvent; the addition of a sufficient amount of water to the reaction mixture; and the isolation of the desired 2,4-dioxotetrahydrofuran-3-carboxylate.

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