A new, improved method is described for the preparation of cyclopalladated benzalimines; it consists of reacting the ortho-bromobenzalimine with bis(dibenzylideneacetone) palladium(0). A number of substituted o-bromobenzalimines has been studied; the bridged bromide dimers and the corresponding bromo (N-substituted benzalimine-6,C,N)triphenylphosphinepalladium(II) complexes have been fully characterised
描述了一种新的,改进的方法,用于制备环palpalated苯扎利明; 它由邻-溴苯甲酰亚胺与双(二亚苄基丙酮)钯(0)反应组成。已经研究了许多取代的邻溴苯甲酰亚胺。桥联的溴化物二聚体和相应的溴(N-取代的苯扎利明-6,C,N)三苯基膦钯(II)配合物已得到充分表征,并记录了1 H和13 C NMR光谱数据。在研究的N-苯基苯甲酰亚胺的情况下,还分离并鉴定了双(三苯基膦)配合物。
Palladium-Catalyzed Chemodivergent Carbonylation of <i>ortho-</i>Bromoarylimine to Biisoindolinones and Spiroisoindolinones
作者:Jiaqi Yan、Yongzheng Ding、Hanmin Huang
DOI:10.1021/acs.joc.2c02170
日期:——
We herein report a palladium-catalyzed carbonylative cyclization reaction of ortho-bromoarylimines that allows for the chemodivergent synthesis of functionalized biisoindolinones and spirocyclic isoindolinones. Either product could be selectively obtained by switching the reaction temperatures and ligands, and the biisoindolinone products could be afforded facilely with catalyst loadings as low as