The internal heavy-atom effect on 3-phenylselanyl and 3-phenyltellanyl BODIPY derivatives studied by transient absorption spectroscopy
作者:Jamaludin Al Anshori、Tomáš Slanina、Eduardo Palao、Petr Klán
DOI:10.1039/c5pp00366k
日期:2016.2
containing analogues as well as an unsubstituted BODIPY derivative. The fluorescence quantum yields were found to decrease, whereas the intersystem crossing quantum yields (PhiISC), determined by transientspectroscopy, increased in the order of the H --> Cl --> Se/I --> Te substitution. The maximum PhiISC, found for the 3-phenyltellanyl derivative, was 59%. The results are interpreted in terms of the internal
合成了三种单取代的3-苯基硒基和3-苯基tellanyl BODIPY衍生物,并对它们的光谱性质进行了表征,并与含有类似物以及未取代的BODIPY衍生物的碘和氯原子的光谱性质进行了比较。发现荧光量子产率降低,而通过瞬态光谱法测定的系统间交叉量子产率(PhiISC)按H-> Cl-> Se / I-> Te取代的顺序增加。对于3-苯基碲烷基衍生物,发现最大的PhiISC为59%。根据取代基的内部重原子效应来解释结果。
Synthesis and evaluation of novel chloropyrrole molecules designed by molecular hybridization of common pharmacophores as potential antimicrobial agents
作者:Rajesh A. Rane、Vikas N. Telvekar
DOI:10.1016/j.bmcl.2010.08.026
日期:2010.10
as antimicrobial agent, 31 novel chloropyrrole derivatives of aroyl hydrazones and chalcones incorporating common pharmacophore of pyoluteorin derivatives were synthesized. Antimicrobial activity of the synthesized compounds was evaluated using broth dilution technique. Based on biological evaluation data it was observed that activity increases as the number of chlorines on pyrrole core increases. Few
Oxidative Ring-Opening of 1<i>H</i>
-Pyrazol-5-amines and Its Application in Constructing Pyrazolo-Pyrrolo-Pyrazine Scaffolds by Domino Cyclization
作者:Lei Pan、Feng Jin、Rui Fu、Ke Gao、Shaofang Zhou、Xiaoguang Bao
DOI:10.1002/ejoc.202000265
日期:2020.5.22
A concise approach to synthesize 3H‐pyrazolo[3,4‐e]pyrrolo[1,2‐a]pyrazine derivatives via oxidative ring‐opening of 1H‐pyrazol‐5‐amines under mild and transition‐metal‐free conditions is described herein.
A versatile, modular synthesis of monofunctionalized BODIPY dyes
作者:Volker Leen、Els Braeken、Kristof Luckermans、Carine Jackers、Mark Van der Auweraer、Noël Boens、Wim Dehaen
DOI:10.1039/b906164a
日期:——
A careful choice of the pyrrole building blocks allows the synthesis of a wide range of monohalogenated BODIPY dyes with excellent reactivity in palladium catalyzed coupling reactions.
Chlorinated BODIPYs: Surprisingly Efficient and Highly Photostable Laser Dyes
作者:Gonzalo Duran-Sampedro、Antonia R. Agarrabeitia、Inmaculada Garcia-Moreno、Angel Costela、Jorge Bañuelos、Teresa Arbeloa、Iñigo López Arbeloa、Jose Luis Chiara、María J. Ortiz
DOI:10.1002/ejoc.201200946
日期:2012.11
A series of mono- to hexachlorinated BODIPYdyes have been prepared in good to excellent yields through the use of N-chlorosuccinimide as an inexpensive halogenating reagent. This library of chlorinated dyes allowed analysis in detail, from the experimental and theoretical points of view, of the dependency of the photophysical and optical properties of the dyes on the number and positions of the chlorine