2-alkylmercapto-4-(trifluoromethyl)benzoic esters and a process for
申请人:Hoechst AG
公开号:US05744021A1
公开(公告)日:1998-04-28
The invention relates to 2-alkylmercapto-4-(trifluoromethyl)benzoic esters of the formula (II), in which R.sup.1 and R.sup.2 are, independently of each other, (C.sub.1 -C.sub.6) alkyl, and a process for their preparation, which comprises reacting 3,4-dichlorobenzotrifluoride electrochemically at an anode with CO.sub.2 to give 2-chloro-4-(trifluoromethyl)-benzoate, converting it into the corresponding benzoic ester of the formula (I), and then reacting it with an alkylmercaptide R.sup.2 S.sup.e. ##STR1##
[EN] ISOXAZOLE DERIVATIVES AND THEIR USE AS HERBICIDES<br/>[FR] DERIVES D'ISOXAZOLE ET LEUR UTILISATION COMME HERBICIDES
申请人:NOVARTIS AG
公开号:WO1999024409A1
公开(公告)日:1999-05-20
(EN) Compounds of formula (I) wherein Z is S, SO or SO2; Q is C=O or CHOH; Ar is phenyl or phenyl substituted by up to four identical or different substituents and agronomically acceptable salts of those compounds, are suitable for use as herbicides.(FR) L'invention concerne des composés de la formule (I) dans laquelle Z est S, SO ou SO2; Q est C=O ou CHOH; Ar est phényle ou phényle substitué par un à quatre substituants identiques ou différents. Lesdits composés et leurs sels agronomiquement acceptables sont efficaces comme herbicides.
Regio- and Chemoselective CH Chlorination/Bromination of Electron-Deficient Arenes by Weak Coordination and Study of Relative Directing-Group Abilities
作者:Xiuyun Sun、Gang Shan、Yonghui Sun、Yu Rao
DOI:10.1002/anie.201300176
日期:2013.4.15
It's all relative: A practical and efficient PdII‐catalyzed regio‐ and chemoselectivechlorination/bromination has been developed for the facile synthesis of a broad range of aromatic chlorides. The reaction demonstrates excellent reactivity, good functional‐group tolerance, and high yields. A preliminary study was conducted to evaluate relative directing‐group abilities of various functionalities