Structure-Activity Relationships for the Anaesthetic and Analgaesic Properties of Aromatic Ring-Substituted Ketamine Esters
作者:Ivaylo V. Dimitrov、Martyn G. Harvey、Logan J. Voss、James W. Sleigh、Michael J. Bickerdike、William A. Denny
DOI:10.3390/molecules25122950
日期:——
from the corresponding substituted norketamines. Few of the latter have been reported since they have not been generally accessible via known routes. We report a new generalroute to many of these norketamines via the Neber (oxime to α-aminoketone) rearrangement of readily available substituted 2-phenycyclohexanones. We explored the use of the substituents Cl, Me, OMe, CF3, and OCF3, with a wide range
Highly Efficient Synthesis of 2-Substituted Benzo[b]furan Derivatives from the Cross-Coupling Reactions of 2-Halobenzo[b]furans with Organoalane Reagents
route for the synthesis of 2-substituted benzo[b]furans has been developed by palladium-catalyzed cross-coupling reaction of 2-halobenzo[b]furans with aryl, alkynyl, and alkylaluminum reagents. Various 2-aryl-, 2-alkynyl-, and 2-alkyl-substituted benzo[b]furan derivatives can be obtained in 23–97% isolated yields using 2–3 mol% PdCl2/4–6 mol% XantPhos as the catalyst under mild reaction conditions. The
Quaternary Carbon Stereogenic Centers through Copper-Catalyzed Enantioselective Allylic Substitutions with Readily Accessible Aryl- or Heteroaryllithium Reagents and Aluminum Chlorides
作者:Fang Gao、Yunmi Lee、Kyoko Mandai、Amir H. Hoveyda
DOI:10.1002/anie.201005124
日期:2010.11.2
of the notorious aryls is solved: The first efficient catalytic and enantioselective method for allylicsubstitutions that furnish quaternary carbon stereogenic centers by additions of aryl‐ or heteroarylmetals is reported (see scheme). Highly site‐ and enantioselective processes begin with readily available organolithium reagents.
alcohols, as well as the dissociative anesthetic agent Tiletamine. A new method has been developed for the efficient synthesis of cyclic β-aryl-β-amino alcohol derivatives bearing a tetrasubstituted carbon center via the [3,3]-sigmatropicrearrangement of N-(benzoyloxy)enamides followed by nucleophilic arylation reaction with a range of triarylaluminum reagents. The resulting products were converted into
Copper-Catalyzed Electrophilic Amination of Heteroarenes via C–H Alumination
作者:Hongju Yoon、Yunmi Lee
DOI:10.1021/acs.joc.5b01863
日期:2015.10.16
A highly efficient Cu-catalyzed electrophilic amination reaction of readily available heteroarenes with O-benzoyl hydroxylamines via a one-pot C-H alumination is reported. The reactions were catalyzed using 1 mol % of CuCl to afford various heteroaryl amines in good to excellent yields. The direct C-H lithiation/transalumination of heteroarenes and catalytic amination sequence can be performed in a single vessel on gram scales.