Cascade Reactions Initiated by Oxopalladation

Hu et al. developed a highly efScient synthetic approach for the carbonylative cyclization of o-alkynylphenols 2 2 to the corresponding 2-substituted-3-aroyl-benzo[h] 

SCHEME 6.54 Cascade reaction for the preparation of substituted benzofurans. 

SCHEME 6.56 Palladium-catalyzed carbonylation/cyclization cascade. 

SCHEME 6.57 Sequential homobimetallic palladium-catalyzed cascade reaction. 

SCHEME 6.58 Palladium-catalyzed ring opening/heterocycUzation/carbonylation cascade. 

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