Highly Efficient Photocatalytic Divergent Decarbonylative Silylation with Cinnamaldehyde via a [Ru(dcbpy)(bpy)2]2+-Incorporated UiO-67 Framework

We herein develop an innovative approach for the decarbonylative silylation using a molecular [Ru(dcbpy)(bpy)₂]²⁺ (dcbpy = 2,2′-bipyridyl-5,5′-dicarboxylic acid; bpy = 2,2′-bipyridine) incorporated UiO-67 metal–organic framework (MOFs) (denoted as UiO-67-Ru) as a powerful heterogeneous catalyst, which is then applied in the reaction of abundantly available cinnamaldehydes with silanes under photothermal condition. Mechanistic studies reveal that the silane can be absorbed and activated within the cavities of the framework, leading to the generation of a silyl radical. The silyl radical plays a key role in the decarbonylative silylation process and further goes through oxidative silylation with cinnamaldehydes to generate the corresponding alkenyl silanes. This work not only develops a strategy for the preparation of alkenyl silane from highly abundant cinnamaldehyde and silanes but also affords useful inspiration on the rational design of MOFs materials for the decarbonylative silylation.