Copper(II)-Catalyzed Amidations of Alkynyl Bromides as a General Synthesis of Ynamides and <i>Z</i>-Enamides. An Intramolecular Amidation for the Synthesis of Macrocyclic Ynamides
作者:Xuejun Zhang、Yanshi Zhang、Jian Huang、Richard P. Hsung、Kimberly C. M. Kurtz、Jossian Oppenheimer、Matthew E. Petersen、Irina K. Sagamanova、Lichun Shen、Michael R. Tracey
DOI:10.1021/jo060230h
日期:2006.5.1
method for the coupling of a wide range of amides with alkynyl bromides is described here. This novel amidation reaction involves a catalytic protocol using copper(II) sulfate-pentahydrate and 1,10-phenanthroline to direct the sp-C−N bond formation, leading to a structurally diverse array of ynamides including macrocyclic ynamides via an intramolecular amidation. Given the surging interest in ynamide chemistry
Palladium‐Catalyzed Silylcyanation of Ynamides: Regio‐ and Stereoselective Access to Tetrasubstituted 3‐Silyl‐2‐Aminoacrylonitriles
作者:Pierre Hansjacob、Frédéric R. Leroux、Vincent Gandon、Morgan Donnard
DOI:10.1002/anie.202200204
日期:2022.3.28
Tetrasubstituted 2-aminoacrylonitriles (α-enaminonitriles) are underinvestigated building blocks due to the lack of methodologies to synthesize them in a controlled manner. A general access to these valuable scaffolds accompanied by mechanistic investigations and DFT calculations is described. This highly regio- and stereoselective strategy relies on the use of the first intermolecular silylcyanation
Ruthenium-Catalyzed [2 + 2] Cycloadditions of Ynamides
作者:Nicole Riddell、Karine Villeneuve、William Tam
DOI:10.1021/ol0512841
日期:2005.8.1
[GRAPHICS]Ruthenium-catalyzed [2 + 2] cycloadditions between norbornene and ynamides were investigated. The ynamide moiety was found to be compatible with the ruthenium-catalyzed cycloaddition conditions, giving the corresponding cyclobutene cycloadducts in moderate to good yields (up to 97%).