Copper‐Catalyzed Aerobic Oxidations of 3‐
<i>N</i>
‐Hydoxyaminoprop‐1‐ynes to Form 3‐Substituted 3‐Amino‐2‐en‐1‐ones: Oxidative Mannich Reactions with a Skeletal Rearrangement
作者:Rahul Kisan Kawade、Chang‐Chin Tseng、Rai‐Shung Liu
DOI:10.1002/chem.201404201
日期:2014.10.20
Cu‐catalyzed aerobic oxidations of readily available 3‐N‐hydroxyaminopro‐1‐ynes with water, alcohols, or thiols to form diverse 3‐substituted 3‐amino‐2‐en‐1‐ones are described. The utility of this catalysis is manifested by a wide scope of applicable N‐hydroxyl propargylamines and nucleophiles, thus enabling the design of one‐pot cascade or two‐step sequential reactions. Besides synthetic significances
描述了水,醇或硫醇与易得的3- N-羟基氨基脯氨酸-铜的铜催化的有氧氧化作用,形成了各种3-取代的3-氨基-2-烯-1-酮。这种催化的效用体现在适用N的广泛范围内。-羟基炔丙基胺和亲核试剂,因此可以设计一锅级联或两步顺序反应。除了具有合成意义外,这种氧化曼尼希反应在机械上也很有趣,因为获得了结构重组的产物。我们的机理研究表明,有氧氧化涉及形成硝酮中间体的最初形成,然后是亲核试剂的攻击。在此,水和MeOH以两种不同的途径实现了将硝基中间体转化为反应产物。