Palladium/Imidazolium salt as a versatile catalyst for sequential coupling reactions of aryl dihalides to unsymmetrically substituted arenes

Tetrahedron ◽  
2010 ◽  
Vol 66 (6) ◽  
pp. 1188-1195 ◽  
Author(s):  
Xiaoming Zhang ◽  
Weilong Xie ◽  
Wanzhi Chen
Keyword(s):  
Coupling Reactions ◽  
Imidazolium Salt ◽  
Sequential Coupling

A Cyclobutene-1,2-bis(imidazolium) Salt as Preligand for Palladium-Catalyzed Cross-Coupling Reactions: Properties and Applications

2011 ◽  
Vol 2012 (4) ◽  
pp. 754-763 ◽  
Author(s):  
Alireza Rahimi ◽  
Imre Pápai ◽  
Ádám Madarász ◽  
Mimoza Gjikaj ◽  
Jan C. Namyslo ◽  
...  
Keyword(s):  
Cross Coupling ◽  
Coupling Reactions ◽  
Imidazolium Salt ◽  
Cross Coupling Reactions ◽  
Palladium Catalyzed

Semi-Solid Surface Fluorometric Analysis of Glucose

1975 ◽  
Vol 21 (12) ◽  
pp. 1799-1801 ◽  
Author(s):  
Shiow-ling W Kiang ◽  
Jui-chang W Kuan ◽  
George G Guilbault
Keyword(s):  
Solid Surface ◽  
Low Cost ◽  
Excitation Wavelength ◽  
Coupling Reactions ◽  
Fluorometric Method ◽  
Blood Samples ◽  
Sequential Coupling ◽  
Fluorometric Analysis ◽  
Semi Solid ◽  
Glucose 6 Phosphate Dehydrogenase

Abstract We describe an enzymatic fluorometric method for determining glucose concentrations in blood samples by analysis on a semi-solid surface (silicone-rubber pads). The method is an adaptation of existing spectrophotometric procedures based on the sequential coupling reactions with glucose-6-phosphate dehydrogenase and NADP+. The rate of appearance of NADPH fluorescence at 460 nm (excitation wavelength, 340 nm) is monitored and related to the glucose concentration in plasma or serum. The calibration curve is linear to 2.50 g/liter. The chief advantages of this method over the spectrophotometric procedure are low cost and rapid response. The results obtained correlate well with those of the o-toluidine method (correlation coefficient, 0.986).

Synthesis of palladium-bidentate complex and its application in Sonogashira and Suzuki coupling reactions

2014 ◽  
Vol 68 (5) ◽  
Author(s):  
Boumediene Haddad ◽  
Didier Villemin ◽  
El-habib Belarbi
Keyword(s):  
Catalytic Activity ◽  
Bond Formation ◽  
Coupling Reaction ◽  
Suzuki Coupling ◽  
Complex Iii ◽  
Sonogashira Reaction ◽  
Coupling Reactions ◽  
Imidazolium Salt ◽  
Bidentate Complex ◽  
Phenylboronic Acids

AbstractA new palladium-bidentate complex [m-C6H4(CH2ImMe)2(PdCl2)] (III) was prepared in two steps. In the first step, [m-C6H4(CH2ImMeAgCl)2] (II) (Im = imidazole moiety) was obtained by reacting imidazolium salt [m-C6H4(CH2ImMe)2]Cl2 (I) (prepared by quaternisation of Nmethylimidazole with 1,3-bis(chloromethyl)benzene) and Ag2O in CH2Cl2. In the next step, treatment of (II) with Pd(CH3CN)2Cl2 afforded complex III which was evaluated for its catalytic activity for C-C bond-formation reactions by examining the coupling reaction of 3-iodoanisole with phenylacetylene in the Sonogashira reaction. In addition, 3-methoxybiphenyls were obtained with good to excellent yields by Suzuki coupling reactions of 3-iodoanisole with phenylboronic acids or phenylborates salts in the presence of this complex.

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