Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Timothy E. Barder"'
Autor:
Donald A. Watson, Stephen L. Buchwald, Joseph R. Martinelli, Dominique M. M. Freckmann, Timothy E. Barder
Publikováno v:
The Journal of Organic Chemistry. 73:7102-7107
A method for the Pd-catalyzed carbonylation of aryl bromides has been developed using Xantphos as the ligand. This method is effective for the direct synthesis of Weinreb amides, primary and secondary benzamides, and methyl esters from the correspond
Publikováno v:
Angewandte Chemie. 119:7370-7373
Autor:
Timothy E. Barder, Stephen L. Buchwald
Publikováno v:
Journal of the American Chemical Society. 129:12003-12010
We present results on the binding of a variety amines to monoligated oxidative addition complexes of the type L1Pd(Ar)Cl, where L is 2-dicyclohexylphosphino-2',6'-dimethoxybiphenyl (SPhos, 1) or 2-dicyclohexylphosphino-2',4',6'-tri-ispropylbiphenyl (
Publikováno v:
Angewandte Chemie. 119:5455-5459
Publikováno v:
Organometallics. 26:2183-2192
We present results on the structure of monoligated active catalysts based upon 2-dicyclohexylphosphino-2‘,6‘-dimethoxybiphenyl (SPhos, 1) and 2-dicyclohexylphosphino-2‘,4‘,6‘-triisopropylbiphenyl (XPhos, 2) with Pd(0). Additionally, the rea
Autor:
Steven E. Ealick, Timothy E. Barder, I.I. Mathews, Aaron A. Hoskins, Paul Peng, Akimitsu Okamoto, Judith B. Zaugg, T. Joseph Kappock, Mariya Morar, JoAnne Stubbe
Publikováno v:
Biochemistry. 46:2842-2855
N{sup 5}-Carboxyaminoimidazole ribonucleotide mutase (N{sup 5}-CAIR mutase or PurE) from Escherichia coli catalyzes the reversible interconversion of N{sup 5}-CAIR to carboxyaminoimidazole ribonucleotide (CAIR) with direct CO{sub 2} transfer. Site-di
Publikováno v:
Organometallics. 25:82-91
Both (Xantphos)Pd(dba) and Pd(Xantphos)2 were identified in mixtures of Pd2(dba)3 and Xantphos by use of 31P NMR and independent syntheses. At high ligand concentrations, Pd(Xantphos)2 was found to be the predominant species. Reaction calorimetry was
Autor:
Timothy E. Barder, Stephen L. Buchwald
Publikováno v:
Organic Letters. 9:137-139
[reaction: see text] Although boronic acids are widely used in metal-catalyzed reactions, it is difficult to assay their consumption. As such, we developed a reversible fluorescent sensor that is activated upon binding a boronic acid. The sensor can
Publikováno v:
Pharmaceutical research. 31(2)
To correlate the polymer’s degree of precipitation inhibition of indomethacin in solution to the amorphous stabilization in solid state. Precipitation of indomethacin (IMC) in presence of polymers was continuously monitored by a UV spectrophotomete
Autor:
Dominique M. M. Freckmann, Donald A. Watson, Stephen L. Buchwald, Timothy E. Barder, Joseph R. Martinelli
Publikováno v:
ChemInform. 40
A method for the Pd-catalyzed carbonylation of aryl bromides has been developed using Xantphos as the ligand. This method is effective for the direct synthesis of Weinreb amides, 1° and 2° benzamides, and methyl esters from the corresponding aryl b