Supported Single-Site Ti(IV) on a Metal–Organic Framework for the Hydroboration of Carbonyl Compounds
作者:Zhiyuan Huang、Dong Liu、Jeffrey Camacho-Bunquin、Guanghui Zhang、Dali Yang、Juan M. López-Encarnación、Yunjie Xu、Magali S. Ferrandon、Jens Niklas、Oleg G. Poluektov、Julius Jellinek、Aiwen Lei、Emilio E. Bunel、Massimiliano Delferro
DOI:10.1021/acs.organomet.7b00544
日期:2017.10.23
and supported hydroboration catalysts, ANL1-Ti(OiPr)2 is completely recyclable and reusable, making it a promising hydroboration catalyst alternative for green and sustainable chemical synthesis. In addition, ANL1-Ti(OiPr)2 catalyst exhibits remarkable hydroboration selectivity toward aldehydes vs ketone in competitive study. DFT calculations suggest that the catalytic hydroboration proceeds via a
合成了稳定且结构明确的烷氧基钛醇盐催化剂,该催化剂负载在UiO-67拓扑结构的金属有机框架(MOF)(ANL1-Ti(O i Pr)2)上,并通过多种分析和光谱技术进行了全面表征,包括BET,TGA,PXRD,XAS,DRIFT,SEM和DFT计算。钛功能化的MOF被证明对使用HBpin作为硼源的各种醛和酮的催化加氢硼化具有活性。与传统的均相和负载型硼氢化催化剂相比,ANL1-Ti(O i Pr)2可以完全回收利用和再利用,使其成为绿色和可持续化学合成的有希望的硼氢化催化剂替代品。此外,在竞争研究中,ANL1-Ti(O i Pr)2催化剂对醛类和酮类具有显着的硼氢化选择性。DFT计算表明,催化氢硼化反应是通过(1)活性Ti-氢化物与羰基部分之间的氢化物转移(速率确定步骤)和(2)醇盐转移(分子内σ键复分解)生成硼酸酯而进行的。产品。