Direct Amidation of Amino Acid Derivatives Catalyzed by Arylboronic Acids: Applications in Dipeptide Synthesis
作者:Shouxin Liu、Yihua Yang、Xinwei Liu、Farhana K. Ferdousi、Andrei S. Batsanov、Andrew Whiting
DOI:10.1002/ejoc.201300560
日期:2013.9
The direct amidation of amino acid derivatives catalyzed by arylboronic acids has been examined. The reaction was generally slow relative to simple amine-carboxylic acid combinations though proceeded at 65–68 °C generally avoiding racemization. 3,4,5-Trifluorophenylboronic and o-nitrophenylboronic acids were found to be the best catalysts, though for slower dipeptide formations, high catalyst loadings
已经研究了由芳基硼酸催化的氨基酸衍生物的直接酰胺化。相对于简单的胺-羧酸组合,该反应通常较慢,但通常在 65-68°C 下进行,避免了外消旋化。发现 3,4,5-三氟苯基硼酸和邻硝基苯基硼酸是最好的催化剂,但对于较慢的二肽形成,需要高催化剂负载量,并且发现了两种芳基硼酸之间有趣的协同催化作用。