Accelerating Effect Induced by the Structure of α-Amino Acid in the Copper-Catalyzed Coupling Reaction of Aryl Halides with α-Amino Acids. Synthesis of Benzolactam-V8
作者:Dawei Ma、Yongda Zhang、Jiangchao Yao、Shihui Wu、Fenggang Tao
DOI:10.1021/ja981662f
日期:1998.12.1
hydrophilic groups. No racemization was observed in most cases of this coupling reaction. After some controlled experiments, a possible mechanism including the π-complex and the intramolecular substitution reaction is proposed. Based on this catalyzed reaction, a facile and stereoselective synthesis of benzolactam-V8, a new PKC activator, is achieved.
光学纯的 α-氨基酸与芳基卤化物的偶联产生对映纯的 N-芳基-α-氨基酸,在 CuI 的催化下保留构型。即使对于富电子的芳基卤化物,该反应也可以在比典型的 Ullmann 缩合低得多的温度下完成,这表明该反应中存在由 α-氨基酸结构诱导的加速效应。具有较大疏水基团的α-氨基酸产生较高的偶联产率,而具有较小疏水基团的α-氨基酸仅产生较低的产率,并且对于具有亲水基团的那些没有检测到偶联产物。在该偶联反应的大多数情况下未观察到外消旋化。经过一些对照实验,提出了一种可能的机制,包括 π 络合物和分子内取代反应。
Fluoro substituted aryl esters and thiolesters of amino acids
申请人:Zoecon Corporation
公开号:US04231953A1
公开(公告)日:1980-11-04
Fluoro substituted aryl esters and thiolesters of amino acids, intermediates therefor, synthesis thereof and the use of said esters and thiolesters and compositions for the control of pests.
氟代芳基氨基酸酯和硫酯酯,其中间体,其合成以及使用所述酯和硫酯酯和组合物控制害虫。
Pyridyl esters of .alpha.-substituted amino acids
申请人:Zoecon Corporation
公开号:US04226872A1
公开(公告)日:1980-10-07
Pyridyl esters and thiolesters of amino acids, intermediates therefor, snythesis thereof and the use of said esters and thiolesters and compositions for the control of pests.
吡啶酯和氨基酸的硫酯酯类,其中间体,其合成以及使用所述酯类和硫酯酯类和组合物来控制害虫。
Substituted amino acids
申请人:Zoecon Corporation
公开号:US04243819A1
公开(公告)日:1981-01-06
Esters and thiolesters of amino acids, intermediates therefor, synthesis thereof, and the use of said esters and thiolesters and compositions for the control of pests.