Palladium-Catalyzed Enantioselective 7-<i>exo</i>-Trig Carbopalladation/Carbonylation: Cascade Reactions To Achieve Atropisomeric Dibenzo[<i>b</i>,<i>d</i>]azepin-6-ones
作者:Huaanzi Hu、Yan Peng、Ting Yu、Sidi Cheng、Shuang Luo、Qiang Zhu
DOI:10.1021/acs.orglett.1c01036
日期:2021.5.7
Enantioselective 7-exo-trig cyclocarbopalladation-initiated carbonylation cascade reactions, leading to seven-membered dibenzo[b,d]azepin-6-ones containing a thermodynamically controlled stereogenic axis, have been realized for the first time. A series of 7-acetate- or 7-acetamide-substituted dibenzo[b,d]azepin-6-ones are obtained under atmospheric pressure of CO in good yields with excellent diastereo-
对映选择性7-外-trig cyclocarbopalladation发起的羰基化级联反应,导致七元二苯并[ b,d ]含有热力学控制立体轴线氮杂-6-酮,已经实现首次。在CO的大气压下,以良好的收率和优异的非对映选择性和对映选择性,获得了一系列被7-乙酸酯或7-乙酰胺取代的二苯并[ b,d ]氮杂6-1-酮。由立体异构联芳基轴和立体异构中心产生的非对映异构体之间的计算能量差约为2.8 kcal / mol,这与观察到的优异的非对映选择性是一致的。