Palladium-Catalyzed Multicomponent Coupling of Alkynes, Imines, and Acid Chlorides: A Direct and Modular Approach to Pyrrole Synthesis
作者:Rajiv Dhawan、Bruce A. Arndtsen
DOI:10.1021/ja039152v
日期:2004.1.1
A new palladium-catalyzed method to prepare pyrroles directly from three basic building blocks-imines, alkynes, and acid chlorides-is described. This approach provides a straightforward method both to prepare pyrroles in one step and to diversify their structure by simple variation of any of the three starting materials. Mechanistic studies suggest that this process occurs via a complex series of eight
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.
Palladium-Catalyzed Stille-Type Coupling of <i>N</i>-Acyl Iminium Ions with Distannanes: A Multicomponent Synthesis of α-Amidostannanes
作者:Boran Xu、Bruce A. Arndtsen
DOI:10.1021/cs401164z
日期:2014.3.7
The palladium-catalyzed three-component coupling of imines, acid chlorides, and hexabutyldistannane is described. This results in the synthesis of various α-amidostannanes in good yields, without the use of strong nucleophilic organometallic reagents. The reaction is believed to proceed via a Stille-type cross coupling of an in situ-generated N-acyl iminium salt with Bu3SnSnBu3 and reaches completion