Cyclic Acyl Disulfides and Acyl Selenylsulfides as the Precursors for Persulfides (RSSH), Selenylsulfides (RSeSH), and Hydrogen Sulfide (H2S)
摘要:
The reactions of three model compounds (1-3) for cyclic acyl disulfides and cyclic acyl selenylsulfides are studied. These compounds were found to be effective precursors for persulfides (RSSH) and selenylsulfides (RSeSH) upon reacting with nucleophilic species. They could also act as H2S donors when interacting with cellular thiols. The most interesting discovery was the generation of RSeSH from compound 3 under mild conditions. Selenylsulfides (RSeSH) are expected to be important regulating molecules involved in Sec-related redox signaling. The method of producing RSeSH should allow researchers to better understand the chemical biology of RSeSH.
A unique reaction between H2S and a selenenyl sulfide containing benzoate ester template was discovered. This reaction could be specifically triggered by H2S and lead to ester bond cleavage. The reaction was not affected by the presence of thiols such as glutathione and cysteine. With this reaction, a series of fluorescent probes were synthesized and evaluated. The probes exhibited high sensitivity/selectivity
A General Strategy for Development of Near‐Infrared Fluorescent Probes for Bioimaging
作者:Wei Chen、Shi Xu、Jacob J. Day、Difei Wang、Ming Xian
DOI:10.1002/anie.201710688
日期:2017.12.22
by easy modifications on the phenolic hydroxy group. Based on WR6, two NIR fluorescent turn‐on probes, WSP‐NIR and SeSP‐NIR, were devised for the detection of H2S. The probe SeSP‐NIR was applied in visualizing intracellular H2S. These dyes are expected to be useful fluorophore scaffolds in the development of new NIR probes for bioimaging.
Understanding Reactivity and Assembly of Dichalcogenides: Structural, Electrostatic Potential, and Topological Analyses of 3<i>H</i>-1,2-Benzodithiol-3-one and Selenium Analogs
that CD···CC interactions drive molecular orientation in molecular assembly. Strength of ChB is measured in terms of the topological properties of ρ(r), whereas the intensity of the electrophilic···nucleophilic interaction is monitored by [(L/ρ)CC – (L/ρ)CD]/dCC···CD2. The σ-hole in side-on conformation forms the strongest ChB interactions in molecular assembly. Reactivity of molecules against nucleophilic
用一系列的3 H -1,2-苯并二硫基-3-(thi)one衍生物及其(混合的)硒化类似物研究了分子组装和反应性。单体的静电势计算结果表明,二卤化氢Ch-Ch键(Ch = S,Se)周围有三个σ孔区域,一侧朝上,两个沿结合方向。电子密度ρ(r)的拓扑分析指出了Ch–Ch键的弱性质。σ孔和孤对区是根据硫族元素原子的价壳中的电荷耗尽(CD)和电荷浓度(CC)位点描述的。而CD和CC位点的特征在于拓扑临界点大号([R)=-∇ 2 ρ(ř),它们的亲电和亲核能力通过相应的L /ρ值来衡量。在晶体结构中,每个硫族元素键(ChB)都包含一个σ孔区域,并显示出CD···CC相互作用,该相互作用与CD和CC位置所属的原子的核间方向对齐。对于每个晶体结构中的所有ChB相互作用,排列均同时保持,表明CD···CC相互作用驱动分子组装中的分子取向。ChB的强度是根据ρ(r)的拓扑性质来衡量的,而亲电···亲核相互作用的强度则通过[(L
A ratiometric fluorescent probe for hydrogen sulfide based on the nucleophilic substitution-cyclization of diselenides
A new ratiometric fluorescence probe for hydrogensulfide is developed. The design was based on a H2S-mediated diselenide cleavage and intramolecular cyclization to release the fluorophore. The probe showed high selectivity and sensitivity for H2S over other reactive sulfur species and was successfully applied for the detection of H2S in bovine plasma and bioimaging in live cells.