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.
3‐(o‐Carboxyphenyl)propionic acid and four of its heteroatom‐containing analogs, as well as benzene‐ring‐fused analogs, have been shown to undergo a Castagnoli–Cushman reaction when dehydrated in the presence of an imine using aceticanhydride. This provides a facile, diastereoselective route to skeletally diverse arene‐fused ε‐lactams.
A palladium-catalyzed synthesis of (hetero)aryl-substituted imidazoles from aryl halides, imines and carbon monoxide
作者:Jevgenijs Tjutrins、Bruce A. Arndtsen
DOI:10.1039/c6sc04371b
日期:——
We describe here a tandem catalytic route to prepare imidazoles in a single operation from aryliodides, imines and CO. The reaction involves a catalytic carbonylation of aryl halides with imines to form 1,3-dipoles, which undergo spontaneous 1,3-dipolar cycloaddition. Overall, this offers an alternative to couplingreactions to construct the (hetero)aryl-imidazole motif, where variation of the building
Tunable Synthesis of α-Amino Boronic Esters from Available Aldehydes and Amines through Sequential One-Pot Dehydration and Copper-Catalyzed Borylacylation
作者:Qi Xia、Hua-Rong Chang、Juan Li、Jia-Yi Wang、Yan-Qing Peng、Gong-Hua Song
DOI:10.1021/acs.joc.9b02887
日期:2020.2.21
Copper-catalyzed multicomponent borylacylation of imines with acid chlorides and bis(pinacolato)diboron was developed for the preparation of synthetically useful and pharmacologically relevant α-amino boronic acid derivatives. Starting from a range of acid chlorides and imines with aryl, heteroaryl, and alkyl substituents, most of these ligand-free reactions proceeded smoothly at room temperature in moderate