Thirteen kinds of fluorinated derivatives of benzo[h]quinoline and benzo[f]quinoline were synthesized by means of the Schiemann reaction or Skraup reaction, or by an electrolytic method. The synthesized derivatives carry one or two fluorine atoms at the bay-region, the K-region, and/or on the pyridine moiety of the molecules. These compounds can be used as models to examine the effect upon genotoxicity of fluorine substitution at appropriate sites on aromatic rings. Physicochemical and spectroscopic data of the fluorinated derivatives are given.
Bimetallic Reductive Elimination from Dinuclear Pd(III) Complexes
作者:David C. Powers、Diego Benitez、Ekaterina Tkatchouk、William A. Goddard、Tobias Ritter
DOI:10.1021/ja1036644
日期:2010.10.13
C-halogen reductiveelimination reactions from dinuclear Pd(III) complexes and implicated dinuclear intermediates in Pd(OAc)(2)-catalyzed C-H oxidation chemistry. Herein, we report results of a thorough experimental and theoretical investigation of the mechanism of reductiveeliminationfrom such dinuclear Pd(III) complexes, which establish the role of each metal during reductiveelimination. Our results
Mechanism of C−F Reductive Elimination from Palladium(IV) Fluorides
作者:Takeru Furuya、Diego Benitez、Ekaterina Tkatchouk、Alexandra E. Strom、Pingping Tang、William A. Goddard、Tobias Ritter
DOI:10.1021/ja909371t
日期:2010.3.24
mechanism study of C-F reductiveeliminationfrom a transition metal complex is described. C-F bond formation from three different Pd(IV) fluoride complexes was mechanistically evaluated. The experimental data suggest that reductiveelimination occurs from cationic Pd(IV) fluoride complexes via a dissociative mechanism. The ancillary pyridyl-sulfonamide ligand plays a crucial role for C-F reductive elimination
Excited State Intramolecular Proton Transfer in Electron-Rich and Electron-Poor Derivatives of 10-Hydroxybenzo[<i>h</i>]quinoline
作者:Joanna Piechowska、Kirsi Huttunen、Zbigniew Wróbel、Helge Lemmetyinen、Nikolai V. Tkachenko、Daniel T. Gryko
DOI:10.1021/jp305459r
日期:2012.10.4
inaccessible derivatives of 10-hydroxybenzo[h]quinoline were prepared via a straightforward strategy comprising formation of the benzo[h]quinoline skeleton followed by C–H acetoxylation at position 10. The occurrence of excited state intramolecular proton transfer (ESIPT) was detected in all cases since emission was observed only from the excited keto-tautomer. Studies on derivatives bearing both electron-donating
通过直接策略制备了八种以前无法获得的10-羟基苯并[ h ]喹啉衍生物,包括形成苯并[ h ]喹啉骨架,然后在位置10进行C–H乙酰氧基化。在所有情况下均能检测到,因为仅从激发的酮-互变异构体观察到发射。对带有与吡啶环相邻的给电子基团和吸电子基团的衍生物的研究使我们能够确定一些引起近红外发射和大斯托克斯位移的设计模式。对于10-羟基苯并[ cac啶,在745 nm处观察到发射,这是ESIPT系统所报道的最低能量的荧光之一。根据时间分辨的测量结果,质子传递非常快,时间常数在(0.08–0.45 ps)范围内。
HIGH-VALENT PALLADIUM FLUORIDE COMPLEXES AND USES THEREOF
申请人:Lee Eunsung
公开号:US20140018538A1
公开(公告)日:2014-01-16
The present invention provides novel high-valent palladium complexes. The complexes typically include multi-dentate ligands that stabilize the octahedral coordination sphere of the palladium(IV) atom. These complexes are useful in fluorinating organic compounds and preparing high-valent palladium fluoride complexes. The invention is particularly useful for fluorinating compounds with
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F for PET imaging.