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Cobalt-catalyzed annulation of styrenes with α-bromoacetic acids.

ABSTRACT: We report a method for addition of α-bromophenylacetic acids to vinyl C[double bond, length as m-dash]C bonds in styrenes to afford γ-lactones. Reactions employed a simple cobalt catalyst Co(NO3)2·6H2O in the presence of dipivaloylmethane (dpm) ligand. Many functionalities including halogen, ester, and nitro groups were compatible with reaction conditions. If α-bromoesters were used, vinylacetates were the major products.

SUBMITTER: Nguyen TT 

PROVIDER: S-EPMC8694682 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature

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Cobalt-catalyzed annulation of styrenes with α-bromoacetic acids.

Nguyen Tung T TT   Ngo Bao H T BHT   Le Huy X HX   Vu Linh N P LNP   To Tuong A TA   Phan Anh N Q ANQ   Phan Nam T S NTS  

RSC advances 20210129 10

We report a method for addition of α-bromophenylacetic acids to vinyl C[double bond, length as m-dash]C bonds in styrenes to afford γ-lactones. Reactions employed a simple cobalt catalyst Co(NO<sub>3</sub>)<sub>2</sub>·6H<sub>2</sub>O in the presence of dipivaloylmethane (dpm) ligand. Many functionalities including halogen, ester, and nitro groups were compatible with reaction conditions. If α-bromoesters were used, vinylacetates were the major products. ...[more]

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