Abstract：
A Cu/Co tandem catalysis protocol was developed to conduct the hydroformylation of olefins using CO2/H2 and PMHS (polymethylhydrosiloxane) as a readily available and environmentally friendly hydride source. This methodology was performed via a two-step approach consisting of the copper-catalyzed reduction of CO2 by hydrosilane and subsequent cobalt-promoted hydroformylation with H2 and the in situ formed CO. The optimized triphos oxide ligand, which presumably facilitates the migratory insertion of CO gives moderate to excellent yields for both terminal and internal alkenes. This earth-abundant metal catalysis provides a reliable and efficient way to afford useful aldehydes in industry using silicon by-product PMHS as hydrogen source and renewable CO2 as carbonyl source.
摘要：
开发了一种Cu/Co串联催化方案，以使用CO2/H2和PMHS（聚甲基氢硅氧烷）作为容易获得且环境友好的氢化物源进行烯烃的加氢甲酰化。该方法是通过两步方法进行的，该方法包括通过氢硅烷进行铜催化的CO2还原，然后用H2和原位形成的CO进行钴促进的加氢甲酰化。优化的三磷氧化物配体，这可能有助于CO的迁移插入，从而为末端和内部烯烃提供中等至优异的产率。这种富含地球的金属催化提供了一种可靠和有效的方式来提供工业中有用的醛,使用硅副产物PMHS作为氢源和可再生CO2作为羰基源。
