Rhodium(III)-Catalyzed Synthesis of Isoquinolines from Aryl Ketone<i>O</i>-Acyloxime Derivatives and Internal Alkynes
作者:Pei Chui Too、Yi-Feng Wang、Shunsuke Chiba
DOI:10.1021/ol102504b
日期:2010.12.17
isoquinolines from aryl ketone O-acyloxime derivatives and internal alkynes has been developed using [Cp*RhCl2]2−NaOAc as the potential catalyst system. The present transformation is carried out by a redox-neutral sequence of C−H vinylation via ortho-rhodation and C−N bond formation of the putative vinyl rhodium intermediate on the oxime nitrogen, where the N−O bond of oxime derivatives could work as an internal
A Mild, Chemoselective, Oxidative Method for Deoximation Using Dess-Martin Periodinane
作者:Sachin S. Chaudhari、Krishnacharya G. Akamanchi
DOI:10.1055/s-1999-3476
日期:1999.5
The Dess-Martin Periodinane (DMP) [1,1,1-triacetoxy-1,1-dihydro-1,2-benziodoxol-3(1H)-one], oxidatively deoximates aldoximes as well as ketoximes in very high yields, smoothly in short time, and under mild conditions. Deoximation occurs selectively in the presence of primary, secondary, and benzylic alcohols, O-methyl oximes, tosylhydrazones, and acid sensitive groups/moieties.
Rh(<scp>iii</scp>)-catalyzed C–H activation/cyclization of oximes with alkenes for regioselective synthesis of isoquinolines
作者:Renjie Chen、Jifeng Qi、Zhenjun Mao、Sunliang Cui
DOI:10.1039/c6ob00942e
日期:——
A Rh(III)-catalyzed C–Hactivation/cyclization of oximes and alkenes for facile and regioselective access to isoquinolines has been developed. This protocol features mild reaction conditions and easily accessible starting materials, and has been applied to the concise synthesis of moxaverine. A kinetic isotope effect study was conducted and a plausible mechanism was proposed.
Kinetics and mechanism of oxime formation from methyl benzoylformate
作者:A. Malpica、M. Calzadilla
DOI:10.1002/poc.932
日期:2005.9
Rate and equilibrium constants for methyl benzoylformate oxime formation were determined as a function of pH over the range from about 0 to 6. The reaction occurs with rate-determining carbinolamine dehydration over the entire range of pH investigated. Specific acid catalysis is dominant at pH < 4. Above that value, a pH-independent reaction becomes apparent. This early appearance of an uncatalyzed
Palladium-catalysed Transfer Hydrogenation of Azobenzenes and Oximes using Ammonium Formate†
作者:G. K. Jnaneshwara、A. Sudalai、V. H. Deshpande
DOI:10.1039/a705957d
日期:——
The reductive cleavage of azobenzenes, including the reduction of oximes to their corresponding amines, has been achieved with Pd0 using ammonium formate as hydrogen source.