Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Charles W. Moeder"'
Publikováno v:
Journal of Liquid Chromatography & Related Technologies. 28:3131-3142
Trifluorophenylacetic acid (TFPAA) was synthesized from 2,4,5‐trifluorophenyl bromide and malonic acid starting materials as part of process development for a pharmaceutical intermediate. Impurity profile methods, sensitive to positional isomers, h
Autor:
Michelle Hardiman, Gerri Hutson, Daniel J. Kumke, Charles W. Moeder, David A. Conlon, Laura Sailer
Publikováno v:
Advanced Synthesis & Catalysis. 346:1307-1315
Addition of methylmagnesium chloride to ester 1 in the presence of cerium chloride gave significantly better yields of the tertiary alcohol 2 than the reaction performed in the absence of cerium chloride. The beneficial effect of added cerium chlorid
Autor:
Charles W. Moeder, John R. Sowa
Publikováno v:
Journal of Physical Organic Chemistry. 17:317-324
A quantitative investigation was undertaken to determine experimentally the relative reaction rates of the heterochiral and homochiral species of B-chlorodiisopinocampheylborane (Dip-Cl), a reagent that exhibits asymmetric amplification. Using the me
Publikováno v:
Journal of the American Chemical Society. 122:7218-7225
We show that complexation of B-chlorodiisopinocampheylborane (Dip-Cl) with 8-hydroxyquinoline results in an air- and moisture-stable complex. Using enantiomerically pure (+)-α-pinene, the (+,+)-Dip-quinoline complex, [(+)-C10H17]2B(η2-N,O-C10H6NO),
Publikováno v:
Journal of Pharmaceutical and Biomedical Analysis. 19:327-333
We report the determination of residual bis(tributyltin) oxide in a drug substance by GC-MS after extraction and on-line conversion to tributyltin hydride. Gas chromatography was performed using a 15 m x 0.25 mm i.d. DB-5 HT column with a temperature
Autor:
John O. Egekeze, Charles W. Moeder, G. Bicker, Robert D. Larsen, Anthony O. King, James D. Carroll, Holly J. Perpall
Publikováno v:
The Analyst. 122:1353-1358
A reversed-phase HPLC method has been developed for the determination of vinylmagnesium chloride and vinylmagnesium bromide, based on the assay of 1-(9-anthryl)propen-2-ol, the product in the reaction between a vinylmagnesium halide and 9-anthraldehy
Autor:
Holly J. Perpall, Richard Thompson, T. Loughlin, Charles W. Moeder, G.B. Smith, G. Bicker, Nelu Grinberg, M. Bhupathy, K. Chong
Publikováno v:
Journal of Pharmaceutical and Biomedical Analysis. 15:111-121
Effective process control can only be achieved through an understanding of the operating issues of the reaction. The development and use of effective and rugged analytical methods is necessary to monitor these parameters. The intent of this paper is
Publikováno v:
Journal of Chromatography A. 736:1-9
The stoichiometric coefficients and apparent formation constants for (±)- α -pinene, (±)- β -pinene, (±)-camphene and (±)-limonene with α- and β-cyclodextrins were determined using high-performance liquid chromatography. These measurements we
Autor:
Toma Ph, Charles W. Moeder, Louis S. Crocker, Conlon Da, Nelu Grinberg, Richard Thompson, Karen C. Thompson, Thomas P. O'Brien, Binyamin Feibush, G. Bicker
Publikováno v:
Analytical chemistry. 69(11)
Cellulose and cellulose derivatives are biopolymers which are often used as stationary phases for the separation of enantiomers. Describing the mechanism of such separations is a difficult task due to the complexity of these phases. In the present st
Autor:
Charles W. Moeder, John R. Sowa
Publikováno v:
Journal of Physical Organic Chemistry; Apr2004, Vol. 17 Issue 4, p317-324, 8p