There are provided crystalline substituted-2,3-dicarboxypyridinium nitrate salts, the preparation thereof and the use thereof in the isolation and purification of important substituted pyridinedicarboxylic acid herbicide intermediates.
Method for the preparation of 2,3-pyridine-dicarboxylic acids and derivatives thereof
申请人:AMERICAN CYANAMID COMPANY
公开号:EP0594993A1
公开(公告)日:1994-05-04
There is provided an improved process for the preparation of substituted and unsubstituted 2,3-pyridinedicarboxylic acids in significantly enhanced yield by the nitric acid oxidation of the appropriately substituted quinoline precursor in the presence of a catalytic amount of Manganese.
Improved method for the preparation of pyridine-2,3-dicarboxylic acids
申请人:AMERICAN CYANAMID COMPANY
公开号:EP0661268A1
公开(公告)日:1995-07-05
The present invention provides an improved method for the preparation of pyridine-2,3-dicarboxylic acids of formula (I) by the continuous oxidation of substituted quinolines of formula (II).
本发明提供了一种通过连续氧化取代的式(II)喹啉来制备式(I)吡啶-2,3-二羧酸的改进方法。
Biocidal compositions comprising iron chelators
申请人:Arch Chemicals, Inc.
公开号:US10433548B2
公开(公告)日:2019-10-08
The present invention, therefore, is directed to an antimicrobial compositions that decreases the bioavailability of iron by introducing a higher-affinity iron-selective chelating agent capable of competing with microbial siderophores. In one aspect, the present invention relates to an antimicrobial composition including a potentiating antimicrobial composition including one or more antimicrobial agents and a chelator having a weight ratio of the antimicrobial agent to the chelator from about 1:1000 to about 1000:1.