Backbone‐Enabled Directional Peptide Macrocyclization through Late‐Stage Palladium‐Catalyzed δ‐C(sp
<sup>2</sup>
)−H Olefination
作者:Zengbing Bai、Chuangxu Cai、Zonglun Yu、Huan Wang
DOI:10.1002/anie.201807953
日期:2018.10.15
allows facile macrocyclization of peptides in the N‐to‐C direction. Combined with the previously developed β‐C(sp3)−H arylation method for peptide macrocyclization in the C‐to‐N direction, a pair of palladium‐catalyzed reactions were obtained that are directionally orthogonal, and the first example of one‐pot synthesis of bicyclic peptides via Pd‐catalyzed β‐C(sp3)−H and δ‐C(sp2)−H activation is demonstrated
用于肽大环化的CH活化方法具有提供模拟肽和环状肽具有扩大的结构多样性的潜力。现在,已经开发出了一种通过后期钯催化苯丙氨酸残基的δ-C(sp 2)-H烯化反应来实现高度通用的肽大环化策略。该方法利用肽主链酰胺作为内部指导基团,并允许肽在N-C方向上容易地进行大环化。结合先前开发的β-C(sp 3)-H芳基化方法在C到N方向进行肽大环化,获得了一对钯催化的,方向正交的反应,这是第一个单罐的例子钯催化的β-C(sp 3)合成双环肽)-H和δ-C(sp 2)-H活化得到了证明。