Late-Stage Macrocyclization of Bioactive Peptides with Internal Oxazole Motifs via Palladium-Catalyzed C–H Olefination
作者:Shu Liu、Chuangxu Cai、Zengbing Bai、Wangjian Sheng、Jiantao Tan、Huan Wang
DOI:10.1021/acs.orglett.1c00580
日期:2021.4.16
the synthesis and direct functionalization of complex oxazole-containing peptides are in high demand. Herein, we report the late-stage site-selective functionalization of oxazole-containing peptides via palladium-catalyzed δ-C(sp2)–H olefination of phenylalanine, tryptophan, and tyrosine residues. This strategy utilizes oxazole motifs as internal directing groups and provides access to oxazole-containing
恶唑是一种重要的药效团,存在于许多生物活性肽天然产物和肽模拟物的骨架中。对复杂的含恶唑肽的合成和直接功能化的有效方法有很高的需求。在此,我们报告了通过钯催化的苯丙氨酸、色氨酸和酪氨酸残基的δ-C(sp 2 )-H 烯化作用对含恶唑肽进行后期位点选择性功能化。该策略利用恶唑基序作为内部导向基团,并提供了获得具有生物活性的含恶唑肽大环化合物的途径。