作者:Maria Salvati、Franca M. Cordero、Federica Pisaneschi、Francesca Bucelli、Alberto Brandi
DOI:10.1016/j.tet.2005.07.020
日期:2005.9
1,3-Dipolar cycloaddition of acrylamide with the cyclic nitrone derived from proline tert-butyl ester has been employed in the synthesis of bicyclic Gly-(s-cis)Pro isosteres suitably protected for the Fmoc-based solid phase peptide synthesis. (R)-1-Phenylethylamine was introduced as chiral auxiliary to resolve racemic intermediates and obtain enantiopure compounds. Using methacrylamide as dipolarophile
丙烯酰胺与衍生自脯氨酸叔丁酯的环硝酮的1,3-偶极环加成反应已用于合成双环Gly-(s - cis)Pro异构体的合成中,适合用于Fmoc基固相肽合成。引入(R)-1-苯基乙胺作为手性助剂,以拆分外消旋中间体并获得对映纯化合物。使用甲基丙烯酰胺作为亲偶极生物,已经以外消旋形式制备了类似的Ala-Pro模拟物,而应用于衣康酸甲酯的相同策略未能提供相应的Asp-Pro模拟物。