作者:Scott D. Rychnovsky、Thomas Beauchamp、Rajappa Vaidyanathan、Tricia Kwan
DOI:10.1021/jo9808831
日期:1998.9.1
Lai's protocol for the synthesis of nitroxides has been extended to the synthesis of several new chiral piperazine and morpholine nitroxides. This strategy utilizes the Bargellini reaction as the key bond-forming step. Several optically pure nitroxides incorporating alpha-aromatic and alpha-spiro centers were prepared by this route. These chiral nitroxides will be of interest as enantioselective oxidants
Lai合成氮氧化物的方案已扩展到几种新的手性哌嗪和吗啉氮氧化物的合成。该策略利用Bargellini反应作为关键的键形成步骤。通过该途径制备了几种结合有α-芳族和α-螺中心的光学纯氮氧化物。这些手性氮氧化物作为对映选择性氧化剂,前手性自由基的捕集剂以及在制备新材料方面将引起人们的兴趣。发现这些氮氧化物之一是化合物43,在温和的氧化条件下会消旋。研究了这种异常外消旋反应的机理。