Rreversible arrowL-Inversion of chiral spirocyclic and open-chain 2-arylaminotropone derivatives with varied heteroatom (O, S, N) has been studied. Kinetic relations holding in the R,L-permutation are discussed. Its mechanism includes formation and dissociation of spiro bonds and torsion stereodynamics.
Intramolecular Hydroamination with Homogeneous Zinc Catalysts: Evaluation of Substituent Effects inN,N′-Disubstituted Aminotroponiminate Zinc Complexes
作者:Maximilian Dochnahl、Karolin Löhnwitz、Jens-Wolfgang Pissarek、Mustafa Biyikal、Sabrina R. Schulz、Sebastian Schön、Nils Meyer、Peter W. Roesky、Siegfried Blechert
DOI:10.1002/chem.200601765
日期:2007.8.6
ethers, and aryl groups were employed. The corresponding aminotroponiminatezinccomplexes were then synthesized and characterized by a number of techniques, including by X-ray crystallography. Herein we report on the investigations into their activity in the intramolecular hydroamination of nonactivated alkenes. We also demonstrate that complexes bearing ligands with cyclic alkyl groups show superior
Synthesis of 2-Aminotropone Oximes and 2-Alkoxytropone Imines†
作者:Tetsuo Nozoe、Lung Ching Lin、Chih-Hsien Hsu、Shwu-Chen Tsay、Gholam H. Hakimelahi、Jih Ru Hwu
DOI:10.1039/a701621b
日期:——
A syntheticroute was developed for preparation of 2-aminotropone oximes 10–14, a new class of compounds, from tropolone 2; 2-methoxytropone imines 7–9 and tropylium salts 17 were generated as the key intermediates.
Novel fluorophores: Syntheses and photophysical studies of boron-aminotroponimines
作者:Chenikkayala Balachandra、Nagendra K. Sharma
DOI:10.1016/j.dyepig.2016.10.051
日期:2017.2
The syntheses and photophysical study of novel fluorescent boron-aminotroponimine complexes are described. The chemical structure of one of the boron complexes was confirmed by single crystal X-ray analysis, which shows the appearance of the distorted tetrahedral geometry at boron. The photophysical studies of these complexes revealed that the boron-aminotroponimines are fluorescent molecules with
Cu‐Catalyzed Synthesis of Alkylaminotroponyl Sulfones as Pseudomonas Aeruginosa Quorum Sensing Inhibitors Targeting
<i>lasI/R</i>
QS Circuitry
作者:Sagarika Meher、Supriya Kumari、Manjusha Dixit、Nagendra K. Sharma
DOI:10.1002/asia.202200866
日期:2022.12
The synthesis of novel alkylaminotroponyl sulfone (ATS) derivatives via Cu-catalyzed C(sp2)−H functionalization on the tropone ring is reported. These sulfones exhibit anti-quorum sensing properties by significant downregulation of lasI/R genes (∼99%) in P. aeruginosa.
报道了通过 Cu 催化的 C(sp 2 )−H 功能化在托酮环上合成新型烷基氨基托苯酰砜 (ATS)衍生物。这些砜通过显着下调铜绿假单胞菌中的lasI/R基因 (~99%)表现出反群体感应特性。
Zwitterionic spirocycles based on dinitrobenzofurazan and tropolone heteroanalogs
作者:A. V. Tkachuk、S. V. Kurbatov、O. N. Burov、M. E. Kletskii、Yu. P. Tavunova、P. G. Morozov、V. A. Voronina、V. I. Minkin
DOI:10.1134/s1070428013090248
日期:2013.9
Zwitterionic spirocyclic sigma-complexes were synthesized by reaction of 7-chloro-4,6-dinitrobenzofurazan with 2-(benzylamino)cyclohepta-2,4,6-trien-1-one, 2-(benzylamino)cyclohepta-2,4,6-triene-1-thione, and N-benzyl-7-(benzylimino)cyclohepta-1,3,5-trien-1-amine. The structure, stereodynamics, and stability of the spirocycles were studied by NMR spectroscopy, X-ray analysis, and DFT quantum chemical calculations at the B3LYP/6-31G** level of theory. The contribution of heteroatoms to positive charge delocalization and the thermodynamic and kinetic stabilities of the spirocycles increase in the series aminotropone < aminothiotropone < aminotropone imine.