Regioselective Deuteration of a 3,4-Dialkoxypyrroline <i>N</i>
-Oxide and Synthesis of 8a-<i>d</i>
-Indolizidines
作者:Anna Ranzenigo、Chiara Mercurio、Maurice Karrenbrock、Franca M. Cordero、Gianni Cardini、Marco Pagliai、Alberto Brandi
DOI:10.1002/ejoc.202000402
日期:2020.6.23
A dialkoxy five‐membered cyclic nitrone smoothly undergoes a base‐catalyzed direct H/D exchange through umpolung reactivity of the carbon atom of the nitrone moiety. Deuterium is incorporated into a useful and versatile building block with total selectivity and a high percentage. Kinetic and in silico data indicate the formation of a transient carbenoid anion.
二烷氧基五元环硝酮通过硝酮部分碳原子的化学反应性,平稳地进行碱催化的直接H / D交换。氘以总选择性和高百分比被并入有用的多功能构建基块中。动力学和计算机模拟数据表明形成了短暂的类胡萝卜素阴离子。