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 ring opening in the presence of different nucleophiles leading to the efficient synthesis 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
介绍了在不同亲核试剂存在下布朗斯台德酸催化的内酯内酯开环,可有效合成受保护的酰胺和氨基酯。以良好至优异的分离产率合成了十六种化合物。通过使用ESI(+)-MS / MS进行的机理研究表明,CSA催化剂可促进氮杂内酯的亲电攻击,从而促进亲核试剂的攻击,从而导致开环和质子化。