Patent · US Active

Multistage process for preparing alkali metal salts of specific 4-hydroxy-2-oxo-2,5-dihydrofuran-3-carboxylic esters

US9139547B2 · kind B2 · utility

0Cited by

1References

9Claims

0Family size

Assignee

BAYER CROPSCIENCE AKTIENGESELLSCHAFT · DE

Inventors

Wahed Ahmed Moradi · Monheim, DE
Christian Funke · Leichlingen, DE
Taraneh Farida · Pulheim, DE
Albert Schnatterer · Leverkusen, DE
Reiner Rosellen · Leverkusen, DE
Volker Brehme · Nottuln, DE
Stefanie Rinker · Dorsten, DE

Key dates

Filing date	Jul 29, 2013
Grant date	Sep 22, 2015
Priority date	—
Expiry date	Jul 29, 2033

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C67/343
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The present invention relates to a multi-stage method for preparing alkali metal salts of specific 4-hydroxy-2-oxo-2,5-dihydrofuran-3-carboxylic esters of the formula (I),in which M and R1 are as defined in the description,which proceeds from malonic ester and does not require isolation of intermediates.

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