Hydrosilylation and Dehydrogenative Silylation of Alkynes

The transition-metal-catalyzed hydrosilylahon of alkynes remains one of the most common routes for the synthesis of vinyl-subshtuted silicon compounds to yield three possible products, 3-E, 3-Z and a (Equation 14.2)  

Catalysts HSiRj R C H (R ) Yield (%) Ratio /Z/a/DH Conditions Reference 

In order to prevent phenylacetylene hydrogenation, and to eliminate the evolution of hydrogen, other unsaturated compounds such as diethylfumarate, diethyl-maleate and diphenylacetylene were added as a hydrogen scavengers [45]. 

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