Synthesis of Fluorescent Alanines by a Rhodium-Catalysed Conjugate Addition of Arylboronic Acids to Dehydroalanine Derivatives
作者:Paula M. T. Ferreira、Luís S. Monteiro、Goreti Pereira、Elisabete M. S. Castanheira、Christopher G. Frost
DOI:10.1002/ejoc.201201198
日期:2013.1
Several β-arylalanine derivatives containing fluorescent groups were prepared in good yields using a rhodium-catalysed conjugate addition of arylboronic acids to N,N-diprotected and N-monoprotected dehydroalanines. The best conditions for these reactions required the use of an excess of arylboronic acid (4 equiv.), [Rh(COD)]BF as catalyst, and CsF as base in dioxane/HO (10:1) at 110 °C. These conditions