A novel photo-click ligation reaction between diarylsydnones and ring-strained alkynes, exhibiting decent bioorthogonality, was established under 405 nm light irradiation.
Evaluation of Sydnone-Based Analogues of Combretastatin A-4 Phosphate (CA4P) as Vascular Disrupting Agents for Use in Cancer Therapy
作者:Andrew W. Brown、Toby Holmes、Matthew Fisher、Gillian M. Tozer、Joseph P. A. Harrity、Chryso Kanthou
DOI:10.1002/cmdc.201800567
日期:2018.12.20
The combretastatins have attracted significant interest as small‐molecule therapies for cancer due to their ability to function as vasculardisruptingagents. We have successfully prepared a range of combretastatinanalogues that are based on a novel sydnone heterocycle core, and their potential as tubulin binders has been assessed in vitro and in vivo. The most potent candidate was found to disrupt
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.
A small library of diarylsydnones (DASyds) was constructed based on aryl-pairing combinations and subjected to click reaction toward alkenes under photo-irradiation with high efficiency. We were able to demonstrate the utility of DASyds for highly fluorescent turn-on ligation targeting the trans-cyclooct-4-en-l-ol moieties on protein.
Direct Arylation of Sydnones with Aryl Chlorides toward Highly Substituted Pyrazoles
作者:Andrew W. Brown、Joseph P. A. Harrity
DOI:10.1021/acs.joc.5b00143
日期:2015.2.20
The direct arylation of the C4 position of both N-alkyl- and N-arylsydnones with aryl/heteroaryl chlorides has been realized. The reaction is quite general and allows access to a wide range of 4-substituted sydnones. Yields of more challenging substrates can be improved through the use of aryl bromides.