Catalytic Transamidation Reactions Compatible with Tertiary Amide Metathesis under Ambient Conditions
作者:Nickeisha A. Stephenson、Jiang Zhu、Samuel H. Gellman、Shannon S. Stahl
DOI:10.1021/ja8094262
日期:2009.7.29
present study reveals that simple zirconium- and hafnium-amido complexes are highly efficient catalysts for equilibrium-controlled transamidation reactions between secondary amines and tertiary amides. In a number of cases, transamidation proceeds rapidly at room temperature. We find that these new catalysts are sufficiently active to promote the metathesis of tertiary amides, which arises from successive
甲酰胺的碳氮键在大多数条件下都非常稳定。本研究表明,简单的锆和铪酰胺配合物是仲胺和叔酰胺之间平衡控制的转酰胺反应的高效催化剂。在许多情况下,转酰胺作用在室温下进行得很快。我们发现这些新催化剂的活性足以促进叔酰胺的复分解,这是由连续的转酰胺循环产生的。我们观察到的催化活性是前所未有的,代表了朝着用羧酰胺进行平衡控制反应的长期目标迈出的重要一步。