Progress toward the Total Synthesis of Callipeltin A (I): Asymmetric Synthesis of (3<i>S</i>,4<i>R</i>)-3,4-Dimethylglutamine
作者:Bo Liang、Patrick J. Carroll、Madeleine M. Joullié
DOI:10.1021/ol006679t
日期:2000.12.1
[reaction:see text] During the total synthesis of the novel cyclic depsipeptide callipeltin A (1), the unit (3S,4R)-3,4-dimethylglutamine, was successfully synthesized by asymmetric Michael addition and subsequent electrophilic azidation. The key feature of this approach is the generation of three adjacent stereogenic centers using the same camphorsultam chiral auxiliary.
[反应:见正文]在新型环状二肽肽Callipeltin A(1)的全合成过程中,通过不对称迈克尔加成反应和随后的亲电子叠氮化成功合成了(3S,4R)-3,4-二甲基谷氨酰胺单元。该方法的关键特征是使用相同的樟脑手性助剂生成三个相邻的立体中心。