An increment system for deuterium isotope effects on13C chemical shifts of methylated benzenes
作者:Stefan Berger、Bernd W. K. Diehl
DOI:10.1002/mrc.1260241210
日期:1986.12
The complete series of all possible benzenes bearing one deuterium atom and one to five methyl groups was synthesized. The deuteriumisotopeeffects on the carbon chemicalshifts of the aromatic and aliphatic carbon atoms were measured and shown to obey an empirical increment system. The isotopeeffects over one bond correlate with the C,H spin coupling constants.
USE OF ARYL CHLORIDES IN PALLADIUM-CATALYZED C-H BOND FUNCTIONALIZATION
申请人:Daugulis Olafs
公开号:US20090012293A1
公开(公告)日:2009-01-08
A one-step method for efficiently converting carbon-hydrogen bonds into carbon-carbon bonds using chloroarenes and palladium catalysts is disclosed. This method allows faster introduction of complex molecular entities, a process that would otherwise require many more steps. This invention is particularly relevant for the organic synthesis of complex molecules such as, but not limited to, pharmacophores.
Two Methods for Direct <i>ortho</i>-Arylation of Benzoic Acids
作者:Hendrich A. Chiong、Quynh-Nhu Pham、Olafs Daugulis
DOI:10.1021/ja071845e
日期:2007.8.1
of free benzoicacids have been developed. The first method employs stoichiometric silver acetate for iodide removal, aryl iodide as the coupling partner, and acetic acid solvent. This method is applicable to the arylation of electron-rich to moderately electron-poor benzoicacids and tolerates chloride and bromide substituents on both coupling partners. The second method involves the use of aryl chloride
Intramolecular deuterium isotope effects in the meta photocycloaddition of aromatic compounds to alkenes
作者:P. de Vaal、G. Lodder、J. Cornelisse
DOI:10.1016/s0040-4020(01)87302-6
日期:1986.1
The effect of substitution of hydrogen by deuterium in some aromatic compounds on product distributions in the meta photocyloaddition to alkenes was investigated. The isotopeeffects found are in agreement with a polar mechanism.
Exchange Reactions of Deuterated Benzene Derivatives with Potassium Amide in Liquid Ammonia<sup>1a</sup>
作者:George E. Hall、Richard Piccolini、John D. Roberts
DOI:10.1021/ja01622a033
日期:1955.9
The rates of deuterium-protium exchange have been determined for o-, m- and p-deuterated fluorobenzene, benzotri-fluoride and anisole in liquidammonia solution in the presence of potassiumamide. The exchange rates were found to be greatest for the ortho compounds and smallest for the para compounds. Deuterobenzene and o-deuterotoluene reacted too slowly for convenient measurement. The results are