Han Chenhui, Meng Peng, Waclawik Eric R, Zhang Chao, Li Xin-Hao, Yang Hengquan, Antonietti Markus, Xu Jingsan
School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4001, Australia.
College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China.
Angew Chem Int Ed Engl. 2018 Nov 5;57(45):14857-14861. doi: 10.1002/anie.201809882. Epub 2018 Oct 16.
Direct hydrogenation of C=C double bonds is a basic transformation in organic chemistry which is vanishing from simple practice because of the need for pressurized hydrogen. Ammonia borane (AB) has emerged as a hydrogen source through its safety and high hydrogen content. However, in conventional systems the hydrogen liberated from the high-cost AB cannot be fully utilized. Herein, we develop a novel Pd/g-C N stabilized Pickering emulsion microreactor, in which alkenes are hydrogenated in the oil phase with hydrogen originating from AB in the water phase, catalysed by the Pd nanoparticles at the interfaces. This approach is advantageous for more economical hydrogen utilization over conventional systems. The emulsion microreactor can be applied to a range of alkene substrates, with the conversion rates achieving >95 % by a simple modification.
碳碳双键的直接氢化是有机化学中的一种基本转化反应，由于需要加压氢气，这种反应在简单的实践中已逐渐消失。氨硼烷（AB）因其安全性和高含氢量而成为一种氢源。然而，在传统体系中，从高成本的AB中释放出的氢气无法得到充分利用。在此，我们开发了一种新型的钯/石墨相氮化碳稳定的Pickering乳液微反应器，其中烯烃在油相中进行氢化反应，氢气来源于水相中的AB，由界面处的钯纳米颗粒催化。与传统体系相比，这种方法在氢利用方面更具经济性。该乳液微反应器可应用于一系列烯烃底物，通过简单的改性，转化率可达到>95%。
