Improved Syntheses of 5‐Hydroxy‐2‐Pyridones (2,5‐Dihydroxypyridines)
摘要:
Improved syntheses of 5-hydroxy-2-pyridone, 6-chloro-5-hydroxy-2-pyridone, 2,4-dihydroxynicotinic acid, and three methyl-substituted 5-hydroxy-2-pyridones are reported.
Process for the preparation of 5-chloro and 5-bromo-2-hydroxynicotinicacids
申请人:A.H. ROBINS COMPANY, INCORPORATED
公开号:EP0225172A1
公开(公告)日:1987-06-10
A process for the preparation of 5-halo-2-hydroxynicotinic acids having the formula
wherein X is chlorine or bromine; Y and Z are selected from hydrogen, loweralkyl, loweralkoxy, chlorine, bromine, iodine or fluorine, is described which comprises halogenating the corresponding 2-hydroxynicotinic acid with hypohalous acid in a concentrated halogen acid or with a alkali-metal hypohalite in aqueous or aqueous basic solution.
描述了一种制备 5-卤代-2-羟基烟酸的工艺,其式中 X 是氯或溴,Y 和 Z 选自氢、低级烷基、低级烷氧基、氯、溴、碘或氟,该工艺包括在浓卤酸中用次卤酸或在水溶液或碱性水溶液中用碱金属次卤酸卤化相应的 2-羟基烟酸。
Fungicidal heterocyclic aromatic amides, their compositions and methods of use
申请人:Dow AgroSciences LLC
公开号:EP1493733A2
公开(公告)日:2005-01-05
The present invention relates to the field of fungicidal compositions and methods. More particularly, the present invention concerns novel fungicidal heterocyclic aromatic amides of following formula I:
wherein:
represents a 5 membered heterocyclic aromatic ring, and methods involving application of fungicidally effective amounts of such compounds to the locus of a plant pathogen. The present invention also concerns methods useful in the preparation of heterocyclic aromatic amides and their fungicidal compositions.
本发明涉及杀菌组合物和方法领域。更具体地说,本发明涉及下式 I 的新型杀菌杂环芳香酰胺:
其中
代表 5 个成员的杂环芳香环,以及将杀真菌有效量的此类化合物施用到植物病原体位点的方法。本发明还涉及用于制备杂环芳香酰胺及其杀菌组合物的方法。
Fungicidal heterocyclic aromatic amides and their compositions, methods of use and preparation
申请人:Dow AgroSciences, LLC
公开号:EP1516874B1
公开(公告)日:2015-08-19
FUNGICIDAL HETEROCYCLIC AROMATIC AMIDES AND THEIR COMPOSITIONS, METHODS OF USE AND PREPARATION