CF<sub>3</sub> Oxonium Salts, <i>O</i>-(Trifluoromethyl)dibenzofuranium Salts: In Situ Synthesis, Properties, and Application as a Real CF<sub>3</sub><sup>+</sup> Species Reagent
作者:Teruo Umemoto、Kenji Adachi、Sumi Ishihara
DOI:10.1021/jo070896r
日期:2007.8.31
We report in situ synthesis of the first CF3 oxonium salts, thermally unstable O-(trifluoromethyl)dibenzofuranium salts, which furthermore have different counteranions (BF4-, PF6-, SbF6-, and Sb2F11-) and ring substituents (tert-butyl, F, and OCH3), by photochemical decomposition of the corresponding 2-(trifluoromethoxy)biphenylyl-2‘-diazonium salts at −90 to −100 °C. The yields markedly increased in
Nickel- or Cobalt-Catalyzed Cross-Coupling of Arylsulfonic Acid Salts with Grignard Reagents
作者:Christian A. Malapit、Michael D. Visco、Jonathan T. Reeves、Carl A. Busacca、Amy R. Howell、Chris H. Senanayake
DOI:10.1002/adsc.201500304
日期:2015.7.6
arylsulfonic acid salts as electrophiles in a nickel‐ or cobalt‐catalyzedcross‐coupling with Grignard reagents is described. Bis(tricyclohexylphosphine)nickel dichloride [NiCl2(PCy3)2] was found to be the optimal catalyst, and reactions with this catalyst proceeded in most cases at roomtemperature. The analogous cobalt catalyst [CoCl2(PCy3)2] was also found to promote the cross‐coupling reaction at higher
FOUNTAIN SOLUTION COMPOSITION FOR LITHOGRAPHIC PRINTING AND HEAT-SET OFFSET ROTARY PRINTING PROCESS
申请人:ARA Yoichiro
公开号:US20100242764A1
公开(公告)日:2010-09-30
A fountain solution composition for lithographic printing characterized by comprising at least one selected from 2,4-diethyl-1,5-pentanediol, 2-butyl-2-ethyl-1,3-propanediol and 1,2-octanediol, and at least one selected from compounds represented by the following general formula (I) or (II):
wherein R
3
to R
5
each independently represent hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a hydroxyalkyl group having 1 to 4 carbon atoms, a hydroxyl group, a halogen atom, a mercapto group, —SO
3
M
1
or —COOM
1
, and M
1
represents hydrogen atom, an alkali metal or NH
4
.
A method for detecting the presence of a metal ion in an aqueous environment, which comprises contacting a micelle-forming material, a hydrophobic or amphiphilic dye, and a hydrophobic ionophore capable of selectively binding the ion with a sample of the aqueous environment to form a mixture and measuring a change in absorbance of light by the dye, is disclosed, along with compositions used in practicing the invention.
PROCESS FOR PRODUCING 2-(HALOMETHYL)PHENYLACETIC ACID ESTERS
申请人:SAGAMI CHEMICAL RESEARCH CENTER
公开号:EP0834497A1
公开(公告)日:1998-04-08
2-(Halomethyl)phenylacetic acid esters (3) which are useful as intermediates for producing agricultural fungicides are produced efficiently and conveniently by reacting a 3-isochromanone derivative (1) with a hydrogen halide and an alcohol or reacting (1) with a halomethyl alkyl ether and then reacting the product with an alcohol in the presence of a base. The starting compound, 3-isochromanone (1), is produced in good yield by reacting an α,α'-o-xylene dihalide (4) with carbon monoxide and water in an organic solvent in the presence of a palladium catalyst and an inorganic base and then treating the product with an acid.