Access to N-Carbonyl Derivatives of Iminosydnones by Carbonylimidazolium Activation
摘要:
A new methodology for N-exocyclic functionalization of iminosydnones was developed involving the addition of a large variety of nucleophiles on carbonyl-imidazolium-activated iminosydnones. This practical and highly versatile method provided access to new classes of iminosydnones and opened a straightforward synthetic route to prepare iminosydnone-based prodrugs.
Syntheses of heterocyclic compounds. Part XVIII. Aminolysis of 3-aryl-4-bromosydnones, and acid hydrolysis of 3-arylsydnoneimines
作者:G. S. Puranik、H. Suschitzky
DOI:10.1039/j39670001006
日期:——
various 3-aryl- and 3-heteroaryl-4-bromosydnones with piperidine gives the corresponding piperidino-glycyl-piperidines. Fluorine labelling has confirmed the postulated course of fission induced by acids in 3-aryl-sydnoneimines.
recently discovered a novel reaction between iminosydnones and strained alkynes leading to two products resulting from ligation and fragmentation of iminosydnones under physiological conditions. We now report the synthesis of a panel of substituted iminosydnones and the structure reactivity relationship between these compounds and strained alkyne partners. This study identified the most relevant substituents
作者:A. S. Samarskaya、I. A. Cherepanov、I. A. Godovikov、V. N. Kalinin
DOI:10.1134/s0012500815080017
日期:2015.8
A preparative method of synthesis of N6-α-haloacyl sydnoneimine derivatives has been developed. These compounds are convenient intermediates for the synthesis of a large variety of N6-α-amino-substituted and N6-α-thio-substituted acyl derivatives of sydnoneimines. The obtained sydnoneimine derivatives may be of interest in the context of searching for new physiologically active compounds.
Iminosydnones are able to quench two fluorophores when connected to their core structure. Bioorthogonal click and release reaction with cyclooctynes provokes significant fluorescence enhancement of the two products, allowing their tracking in cells.
using a bioorthogonalreaction of sulfonyl sydnonimines and dibenzoazacyclooctyne (DIBAC). The second-order rate constant of the cycloaddition reaction can be up to 0.62 M−1 s−1, and the reactants are highly stable under physiological conditions. Most significantly, we also discovered the mutual orthogonality between the sydnonimine–DIBAC and benzonorbornadiene–tetrazine cycloaddition pairs, which can
磺酰胺衍生物已经在药物中使用了数十年。在这里,我们报告了一种新的方法,该方法可使用磺酰基亚砜亚胺和二苯并氮杂环辛炔(DIBAC)的生物正交反应有效地释放磺酰胺。环加成反应的二级速率常数可以高达0.62 M -1 s -1,并且反应物在生理条件下是高度稳定的。最重要的是,我们还发现了亚砜亚胺-DIBAC与苯并降冰片二烯-四嗪环加成对之间的相互正交性,可用于选择性和同时释放磺酰胺和伯胺药物。