Synthesis of Triarylpyridines in Thiopeptide Antibiotics by Using a C−H Arylation/Ring-Transformation Strategy
作者:Kazuma Amaike、Kenichiro Itami、Junichiro Yamaguchi
DOI:10.1002/chem.201600351
日期:2016.3.18
described a C−H arylation/ring‐transformation strategy for the synthesis of triarylpyridines, which form the core structure of thiopeptide antibiotics. This synthetic method readily gave 2,3,6‐triarylpyridines in a regioselective manner by a two‐phase approach: C−H arylation (a nickel‐catalyzed decarbonylative Suzuki–Miyaura cross‐coupling and decarbonylative C−H coupling for the synthesis of 2,4‐diaryloxazoles)
我们已经描述了合成芳基吡啶的三芳基吡啶的CH芳基化/环转化策略,这形成了硫肽抗生素的核心结构。这种合成方法很容易通过两阶段方法以区域选择性方式得到2,3,6-三芳基吡啶:CH芳基化(镍催化的脱羰Suzuki-Miyaura交叉偶联和脱羰CH偶联以合成2 ,4-二芳基恶唑)和环转化([4 + 2] 2,4-二芳基恶唑与(杂)芳基丙烯酸的环加成)。为了展示这些方法,我们已经完成了硫肽抗生素GE2270和支链霉菌素的正式合成。