Palladium-Catalyzed Aryl Iodide Carbonylation as a Route to Imidazoline Synthesis: Design of a Five-Component Coupling Reaction
作者:Sébastien Bontemps、Jeffrey S. Quesnel、Kraig Worrall、Bruce A. Arndtsen
DOI:10.1002/anie.201103885
日期:2011.9.12
Take five: A new method employing aryl halide carbonylation to directly access heterocycles has been described (see scheme). In a single palladium‐catalyzed reaction the catalyst mediates two consecutive carbonylation steps, thereby converting five components (aryliodide, two units imine, and two units CO) into an imidazoline ring.
A Versatile Approach to Dynamic Amide Bond Formation with Imine Nucleophiles
作者:Huseyin Erguven、Evan N. Keyzer、Bruce A. Arndtsen
DOI:10.1002/chem.202001140
日期:2020.5.4
the reversible coupling of imines and acyl chlorides. The reaction employs easily accessible reagents, is dynamic under ambient conditions, without catalysts, and can be trapped with simple hydrolysis. This offers an approach to create broad families of amide products under thermodynamic control, including the selective formation of amide macrocycles or polymers.
Mechanistic Studies on the Michael Addition of Amines and Hydrazines To Nitrostyrenes: Nitroalkane Elimination via a Retro-aza-Henry-Type Process
作者:Michael G. Kallitsakis、Peter D. Tancini、Mudit Dixit、Giannis Mpourmpakis、Ioannis N. Lykakis
DOI:10.1021/acs.joc.7b02637
日期:2018.2.2
In this article we report on the mechanistic studies of the Michaeladdition of amines and hydrazines to nitrostyrenes. Under the present conditions, the corresponding N-alkyl/aryl substituted benzyl imines and N-methyl/phenyl substituted benzyl hydrazones were observed via a retro-aza-Henry-type process. By combining organic synthesis and characterization experiments with computational chemistry calculations
Application of Sequential Cu(I)/Pd(0)-Catalysis to Solution-Phase Parallel Synthesis of Combinatorial Libraries of Dihydroindeno[1,2-<i>c</i>]isoquinolines
作者:Sarvesh Kumar、Thomas O. Painter、Benoy K. Pal、Benjamin Neuenswander、Helena C. Malinakova
DOI:10.1021/co200027c
日期:2011.9.12
methodology is compatible with a wide-range of aliphatic linear, branched, and ester functionalized N-substituents. Unexpectedly, the formation of regioisomers featuring a 1,2,3-contiguous substitution pattern in the aromatic ring of the indene core was observed. Three distinct combinatorial libraries with a total of 111 of members were synthesized, and 80 highly substituted dihydroindenoisoquinolines structurally
Isomerization and Deuterium Scrambling Evidence for a Change in the Rate-Limiting Step during Imine Hydrogenation by Shvo's Hydroxycyclopentadienyl Ruthenium Hydride
作者:Charles P. Casey、Jeffrey B. Johnson
DOI:10.1021/ja044450t
日期:2005.2.1
mechanism analogous to that proposed for aldehyde and ketone reduction. Reduction of electron-rich N-alkyl-substituted imine, N-isopropyl-(4-methyl)benzilidene amine (9), was accompanied by facile imine isomerization and scrambling of deuterium labels from reduction with 5-RuDOH into the N-alkyl substituent of both the amine complex and into the recovered imine. Inverse equilibrium isotope effects were