Synthesis and Antimicrobial Activities of Novel 2-[substituted-1<i>H</i>-pyrazol-4-yl] Benzothiazoles, Benzoxazoles, and Benzimidazoles
作者:Vikas S. Padalkar、Bhushan N. Borse、Vinod D. Gupta、Kiran R. Phatangare、Vikas S. Patil、Nagaian Sekar
DOI:10.1002/jhet.1506
日期:2016.9
find a new class of antimicrobialagents, a series of novelsubstituted benzimidazole, benzoxazole, and benzothiazole derivatives6 containing pyrazole moiety have been synthesized by reaction of 3‐aryl‐4‐formyl pyrazole 4 with substituted phenylenediamine or o‐aminophenol or o‐aminothiophenol 5. Reaction of phenyl hydrazine or 2‐hydrazinopyridine 1 with substituted acetophenones 2 gave the corresponding
Synthesis of Dicyanovinyl-Substituted 1-(2-Pyridyl)pyrazoles: Design of a Fluorescent Chemosensor for Selective Recognition of Cyanide
作者:Jessica Orrego-Hernández、Jaime Portilla
DOI:10.1021/acs.joc.7b02460
日期:2017.12.15
in 58–66% overall yield, by a three-step synthesis sequence starting from p-substituted acetophenones. The substituted p-methoxyphenyl showed good fluorescence emission and large Stokes shifts in different solvents due to its greater ICT. Likewise, this probe evidenced high selectivity and sensitivity and fast recognition for CN– with a detection limit of 6.8 μM. HRMS analysis, 1H NMR titration experiments
一种荧光“关断”探针被设计并成功地应用于检测氰化物(CN - )的基础上Michael型亲核加成反应和分子内电荷转移(ICT)机制。对于这项研究,已在58–66中合成了作为供体-π受体(D-π-A)系统的3-芳基-4-(2,2-二氰基乙烯基)-1-(2-吡啶基)吡唑家族从对位取代的苯乙酮开始的三步合成序列,得到总收率的%。取代的对甲氧基苯基由于其更大的ICT而在不同的溶剂中显示出良好的荧光发射和大的斯托克斯位移。同样,该探针证明了对CN的高选择性和灵敏度以及快速识别–检测限为6.8μM。HRMS分析,1进行了1 H NMR滴定实验和TD-DFT计算,以确认CN –化学光度计的检测机理和荧光性质。此外,荧光试纸可方便地用于检测水溶液中的氰化物。
KR20220105338A
申请人:——
公开号:——
公开(公告)日:——
Synthesis of Novel D-π-A Dyes for Colorimetric Cyanide Sensing Based on Hemicyanine-Functionalized <i>N</i>
-(2-Pyridyl)pyrazoles
作者:Luz-Mery Garzón、Jaime Portilla
DOI:10.1002/ejoc.201901178
日期:2019.11.14
dyes for colorimetric cyanide sensing based on hemicyanine‐functionalized N‐(2‐pyridyl)pyrazoles are provided. These dyes displayed high selectivity and sensitivity for CN– (LOD of up to 9.9 × 10–7 m) by interrupting the D–π–A system by nucleophilicattack of the anion on the iminium group of the dyes.