Rhodium(I)-Catalyzed Carboxylation of Aryl- and Alkenylboronic Esters with CO2
Kazutoshi Ukai, Masao Aoki, Jun Takaya and Nobuharu Iwasawa*
*Department of Chemistry, Tokyo Institute of Technology, O-Okayama, Meguro-ku, Tokyo 152-8551, Japan, Email: niwasawachem.titech.ac.jp
K. Ukai, M. Aoki, J. Takaya, N. Iwasawa, J. Am. Chem. Soc., 2006, 128, 8706-8707.
DOI: 10.1021/ja061232m (free Supporting Information)
Treatment of 2,2-dimethylpropan-1,3-diol esters of aryl- and alkenylboronic acids with a catalytic amount of [Rh(OH)(cod)]2 in the presence of 1,3-bis(diphenylphosphino)propane and CsF in dioxane at 60°C under carbon dioxide atmosphere gave carboxylic acids in good yields.
see article for more examples
J. Takaya, K. Ukai, N. Iwasawa, Org. Lett., 2008, 10, 2697-2700.