Journal of the American Chemical Society, Vol.136, No.41, 14583-14588, 2014
Asymmetric Hydroformylation of Z-Enamides and Enol Esters with Rhodium-Bisdiazaphos Catalysts
Asymmetric hydroformylation (AHF) of Z-enamides and Z-enol esters provides chiral, alpha-functionalized aldehydes with high selectivity and atom economy. Rh-bisdiazaphospholane catalysts enable hydroformylation of these challenging disubstituted substrates under mild reaction conditions and low catalyst loadings. The synthesis of a protected analog of l-DOPA demonstrates the utility of AHF for enantioselective, atom-efficient synthesis of peptide precursors.