An organocatalytic enantioselective Friedel-Crafts alkylation of a series of substituted 1-naphthol derivatives and activated phenols with ethyl trifluoropyruvate, catalyzed by a quinine-derived squaramide, is presented. Good yields and high to excellent enantioselectivities of the Friedel-Crafts alkylation products were obtained.
Montesinos-Magraner, M., Vila, C., Blay, G., Fernández, I., Muñoz, M. C., & Pedro, J. R. (2015). Organocatalytic Enantioselective Friedel-Crafts Alkylation of 1-Naphthol Derivatives and Activated Phenols with Ethyl Trifluoropyruvate. Advanced Synthesis and Catalysis, 357(14–15), 3047–3051. https://doi.org/10.1002/adsc.201500548