We report a method for addition of α-bromophenylacetic acids to vinyl C![[double bond, length as m-dash]](https://www.rsc.org/images/entities/char_e001.gif)
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.
T. T. Nguyen, B. H. T. Ngo, H. X. Le, L. N. P. Vu, T. A. To, A. N. Q. Phan and N. T. S. Phan, RSC Adv., 2021, 11, 5451 DOI: 10.1039/D0RA09588E
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