Synthesis of bis(2-pyridylthio)methyl zinc hydride and catalytic hydrosilylation and hydroboration of CO <sub>2</sub>

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Abstract

The zinc hydride compound, [Bptm]ZnH, is a catalyst for hydroboration of CO ₂ and carbonyl compounds.

Abstract

The reactions of bis(2-pyridylthio)methane with Me ₂Zn and Zn[N(SiMe ₃) ₂] ₂ afford [Bptm]ZnMe and [Bptm]ZnN(SiMe ₃) ₂, thereby providing access to a variety of other [Bptm]ZnX derivatives, including the zinc hydride complex [Bptm]ZnH, which serves as a catalyst for the reduction of CO ₂ and other carbonyl compounds via hydrosilylation and hydroboration.

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Efficient, selective and sustainable catalysis of carbon dioxide

Qing-Wen Song, Zhi-Hua Zhou, Liang-Nian He (2017)

The efficient and selective conversion of CO 2 as a sustainable C 1 resource into valuable chemicals and energy-related products through catalysis is reviewed. Performing CO 2 conversion in a cost-effective and environmentally benign manner would be promising and remains challenging due to its thermodynamic stability and kinetic inertness. Herein, we would like to summarise significant advances in organic synthesis using CO 2 with high catalytic efficiency and excellent selectivity towards the target product mainly during the last five years (2012–2016). Achieving an efficient and selective CO 2 conversion depends on the development of metal catalysts (especially functional metal complex catalysis) including main-group metal, typical transition metal and lanthanide series metal as well as organocatalysts e.g. N-heterocyclic carbenes, N-heterocyclic olefins, task-specific ionic liquids, superbases and frustrated Lewis pairs that are able to effectively activate CO 2 and/or the substrate on the basis of the mechanistic understanding at the molecular level. This review just covers typical catalytic transformation of CO 2 , for instance, carboxylation, amidation, hydrogenation, and representative green processes like solvent-less, halogen-free that use CO 2 as an ideal carbon-neutral source to prepare valuable compounds with improved atom economy and enhanced sustainability of chemical processes through green catalysis. In particular, in situ catalytic CO 2 conversion, i.e. the combination of carbon capture and subsequent conversion, a recent breakthrough in the CO 2 chemistry field, is also discussed.