Nickel(0)-catalyzed coupling reactions of carbonyls and alkenes with reducing reagents giving six- and seven-membered benzocycloalkanols

Abstract

Nickel(0)-catalyzed coupling reactions of 1,6- and 1,7-enals with triethylsilane have been utilized to synthesize six- and seven-membered silyl-protected benzocycloalkanols. When triethylborane was employed as the reducing reagent, tetralol derivatives were obtained. Results of deuterium-labeling experiments suggest the formation of oxanickelacycles as a key reaction intermediate.