A Pd(II)‐Functionalized Covalent Organic Framework for Catalytic Conjugate Additions of Arylboronic Acids to β,β‐Disubstituted Enones
作者:Patrick M. Heintz、Brian P. Schumacher、Minda Chen、Wenyu Huang、Levi M. Stanley
DOI:10.1002/cctc.201900894
日期:2019.9.5
A palladium(II)‐functionalized covalent organic framework (Pd@TpBpy COF) constructed from 1,3,5‐triformylphloroglucinol (Tp) and [2,2′‐bipyridine]‐5,5′‐diamine (Bpy) is reported as a recyclable catalyst for conjugate additions in aqueous media. Additions of an array of stereoelectronically diverse arylboronic acid nucleophiles to β,β‐disubstituted enones form a variety of ketones containing benzylic
据报道,由1,3,5-三甲酰基间苯三酚(Tp)和[2,2'-联吡啶] -5,5'-二胺(Bpy)构成的钯(II)功能化的共价有机框架(Pd @ TpBpy COF)为在水性介质中用于共轭物加成的可循环使用的催化剂。在β,β-二取代的烯酮上添加一系列立体电子学上的芳基硼酸亲核试剂,可形成多种含有苄基全碳季中心的酮,分离产率高达92%。对Pd @ TpBpy COF可循环利用性的研究表明,该催化剂在至少7个循环中仍保持活性,并且相对于具有联吡啶连接单元的相关MOF催化剂而言,具有出色的稳定性。