Catalytic CO2 hydrosilylation is a chemical process that could be potentially applied to large-scale transformations.

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During recent years, the catalytic transformation of CO 2 using silicon-hydrides as reductants has emerged as a promising methodology that allows the selective reduction of CO 2 to the formate, formaldehyde, methoxide or methane level under mild reaction conditions. Moreover, some catalysts have been employed for the formylation and/or methylation of the NÀH bonds of secondary and/or primary amines by their reaction with CO 2 and hydrosilanes. This work summarizes the different catalytic systems that have shown to be efficient for the abovementioned reactions. Furthermore, a brief description of the reactions performance and the conditions employed in each case is included.[a] Dr. ReviewsScheme 12. Complex RuÀS (21)-catalyzed CO 2 -reduction with HSiEt 3 to the bis(silyl)acetal level.Scheme 13. [Ni(PBP)]-catalyzed CO 2 -reduction with hydrosilanes to the bis (silyl)acetal level.Scheme 14. Reaction of [Sc(RCO 2 )(AbP t Bu 2 )] (26) with B(C 6 F 5 ) 3 . Ar= 3,5-ditertbutylphenyl, R=CH 2 SiMe 2 Ph.Scheme 15. CO 2 -reduction with HSiPh 3 to the bis(silyl)acetal level catalyzed by ion pairs 30 (0.5 mol % + 2.0 mol % of B(C 6 F 5 ) 3 ) and 31 (2.0 mol % + 8.0 mol % of B(C 6 F 5 ) 3 ).Scheme 16. CO 2 -reduction with HSiEt 3 to the bis(silyl)acetal level catalyzed by the N,P-heterocyclic germylene-B(C 6 F 5 ) 3 adduct (34).