Stereoselective Synthesis of Functionalized Cyclic Amino Acid Derivatives via a [2,3]-Stevens Rearrangement and Ring-Closing Metathesis
作者:Aaron Nash、Arash Soheili、Uttam K. Tambar
DOI:10.1021/ol402129h
日期:2013.9.20
been developed. The process includes a palladium-catalyzed tandem allylic amination/[2,3]-Stevens rearrangement followed by a ruthenium-catalyzed ring-closing metathesis. The [2,3]-rearrangement proceeds with high diastereoselectivity through an exo transition state. Oppolzer’s chiral auxiliary was utilized to access an enantiopure cyclic amino acid by this approach, which will enable future biological
非天然环状氨基酸是生物医学研究和药物发现中的宝贵工具。已经开发了一种两步立体选择性策略,用于将简单的甘氨酸衍生的氨基酯转化为非天然的环状氨基酸衍生物。该过程包括钯催化的串联烯丙基胺化/ [2,3]-史蒂文斯重排,然后进行钌催化的闭环复分解反应。[2,3]重排通过exo过渡态以非对映选择性高的方式进行。通过这种方法,利用Oppolzer的手性助剂获得对映体纯的环状氨基酸,这将使将来的生物学应用成为可能。