Reactions Involving Carbonylations Promoted by Ruthenium Complexes

Reactions Involving Carbonylations Promoted by Ruthenium Complexes 

Ruthenium complexes are also suitable catalysts for carbonylation reactions of a variety of substrates. Indeed, when a reaction leads to C-Ru or het-eroatom-Ru bond formation in the presence of carbon monoxide, CO insertion can take place at the coordinatively unsaturated ruthenium center, leading to linear ketones or lactones. Thus, ruthenium-catalyzed carbonylative cyclization was involved in the synthesis of cyclopentenones by reaction of allylic carbonates with alkenes in the presence of carbon monoxide [124] (Eq. 93). 

Insertion of carbon monoxide can also allow the formation of the C-C bond. For example, y-butyrolactones were produced by carbonylative cyclization of allenols [125] (Eq. 94). 

Reactions involving carbonylation are detailed in the chapter Selective Car-bonylations with Ruthenium Catalysts of this volume. 

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