Brønsted acid catalyzed azlactone ring opening by nucleophiles
作者:Adriane A. Pereira、Pedro P. de Castro、Amanda C. de Mello、Bruno R.V. Ferreira、Marcos N. Eberlin、Giovanni W. Amarante
DOI:10.1016/j.tet.2013.11.037
日期:2014.5
Brønsted acid catalyzed azlactone ringopening in the presence of different nucleophiles leading to the efficientsynthesis of protected amides and amino esters is presented. Sixteen compounds were synthesized in good to excellent isolated yields. Mechanism investigation by using ESI(+)-MS/MS revealed that the CSA catalyst promotes azlactone activation for electrophilic attack facilitating therefore