A novel photo-click ligation reaction between diarylsydnones and ring-strained alkynes, exhibiting decent bioorthogonality, was established under 405 nm light irradiation.
Photoisomerization-enhanced 1,3-dipolar cycloaddition of carbon-bridged octocyclic azobenzene with photo-released nitrile imine for peptide stapling and imaging in live cells
ring-strained NN double bond as a dipolarophile was discovered. The photo-isomerization of carbon-bridged octocyclic azobenzene (CBOA) into its trans-configuration accelerates the ligation reaction at a very rapid rate (28 400 M−1 s−1). The CBOA-based photo-click reaction was proved to be bioorthogonal. In addition, the NoxaB peptide was successfully cross-linked by a CBOA stapler which plays a dual role: photo-control
发现在腈亚胺和高度环应变的N N双键之间以光诱导的1,3-偶极环加成形式形成了亲极性。碳桥键合的八环偶氮苯(CBOA)的光异构化使其反式构型以非常快的速率(28 400 M -1 s -1)加速了连接反应。基于CBOA的光点击反应被证明是生物正交的。此外,NoxaB肽已被CBOA装订器成功交联,该装订器起着双重作用:光控制肽的构象和探针在活细胞中的光缀合。
An Easy Direct Arylation of 3-Arylsydnones
作者:Chunxiang Kuang、Yiwen Yang、Hao Gong
DOI:10.1055/s-0033-1338412
日期:——
Abstract An easy one-step synthesis of 3,4-diarylsydnones from 3-arylsydnones and arylboronic acids by Pd-catalyzed C–H bond activation is described. An easy one-step synthesis of 3,4-diarylsydnones from 3-arylsydnones and arylboronic acids by Pd-catalyzed C–H bond activation is described.