Results 11 to 20 of about 33,489 (175)

Silver-Catalyzed Cascade Cyclization of Amino-NH-1,2,3-Triazoles with 2-Alkynylbenzaldehydes: An Access to Pentacyclic Fused Triazoles

Molecules, 2022
An operationally simple Ag(I)-catalyzed approach for the synthesis of isoquinoline and quinazoline fused 1,2,3-triazoles was developed by a condensation and amination cyclization cascade of amino-NH-1,2,3-triazoles with 2-alkynylbenzaldehydes involving ...
Shuitao Zhang, Jianxin Li, Tiebo Xiao, Baomin Yang, Yubo Jiang   +4 more
doaj   +1 more source

Crystal structure of 7′-(4-chlorophenyl)-2′′-(4-methoxyphenyl)-7′,7a',7′′,8′′-tetrahydro-1′H,3′H,5′′H-dispiro[indoline-3,5′-pyrrolo[1,2-c]thiazole-6′,6′′-quinoline]-2,5′′-dione and an unknown solvent

Acta Crystallographica Section E: Crystallographic Communications, 2019
The asymmetric unit of the title compound, C34H28ClN3O3S, contains two independent molecules (A and B). They differ essentially in the orientation of the 4-methoxyphenyl ring with respect to the pyridine ring of the quinoline moiety; this dihedral angle ...
R. Vishnupriya, M. Venkateshan, J. Suresh, R. V. Sumesh, R. Ranjith Kumar, P. L. Nilantha Lakshman   +5 more
doaj   +1 more source

Efficient Synthesis of Isoquinoline Derivatives through Sequential Cyclization–Deoxygenation Reaction of 2-Alkynylbenzaldoximes

SynOpen, 2022
We describe a novel, simple, robust, and efficient cyclization/deoxygenation approach for the synthesis of functionalized isoquinoline derivatives. Over the course of continued studies on o-alkynylbenzaldoxime cyclization reactions, the formation of ...
Mojtaba Ayoubi, Ali Nikbakht, Kamran Amiri, Alireza Abbasi Kejani, Hossein Zahedian Tejeneki, Saeed Balalaie   +5 more
doaj   +1 more source

Diazanaphthalenes: A 13C NMR investigation on the site of protonation and pKa values [PDF]

, 1976
The pH dependence of the 13C chemical shifts (δ) of the diazanaphthalenes has been recorded. From this dependence the pKa values have been determined using the Henderson-Hasselbach equation.
Meer, Douwe van der, Thijsse, Hans, Weijer, Peter van de   +2 more
core   +2 more sources

Spectroscopic Properties of Polycyclic Aromatic Compounds. Examination of Nitromethane as a Selective Fluorescence Quenching Agent for Alternant Polycyclic Aromatic Nitrogen Hetero-Atom Derivatives [PDF]

, 1992
Article on the spectroscopic properties of polycyclic aromatic compounds and an examination of nitromethane as a selective fluorescence quenching agent for alternant polycyclic aromatic nitrogen hetero-atom ...
Acree, William, Kimihiro, Hiruta, Langhals, Heinz, Tanga, Mary, Tokita, Sumio, Tucker, Sheryl A.   +5 more
core   +1 more source

Spiropyran-Isoquinoline Dyad as a Dual Chemosensor for Co(II) and In(III) Detection

Molecules, 2017
Spiropyran derivatives have been studied as light-regulated chemosensors for a variety of metal cations and anions, but there is little research on chemosensors that simultaneously detect multiple metal cations.
Yong-Min Kho, Eun Ju Shin
doaj   +1 more source

New (Iso)quinolinyl-pyridine-2,6-dicarboxamide G-Quadruplex Stabilizers. A Structure-Activity Relationship Study

Pharmaceuticals, 2021
G-quadruplex (G4)-interactive small molecules have a wide range of potential applications, not only as drugs, but also as sensors of quadruplex structures.
Enrico Cadoni, Pedro R. Magalhães, Rita M. Emídio, Eduarda Mendes, Jorge Vítor, Josué Carvalho, Carla Cruz, Bruno L. Victor, Alexandra Paulo   +8 more
doaj   +1 more source

Perfluoro effect in the photoelectron spectra of quinoline and isoquinoline [PDF]

, 1972
The high-resolution He 584Aophotoelectron spectra of heptafluoroquinoline and heptafluoroisoquinoline are compared with those of the parent compounds. Shifts in π ionisation potentials, due to the fluorine substitution, can be described with an inductive
Ham, D.M.W. van den, Meer, D. van der
core   +3 more sources

Isolation of Alkaloid Compounds from Ethanol Extract of Rimpang Galang Merah (Alpinia purpurata (Vielli) K. Schum) and nanoparticle production from its Alkaloid Extract. Comparative Study of Antibacterial Properties on Staphylococcus aureus and Eschericia

Jurnal Kimia Sains dan Aplikasi, 2018
Isolation of alkaloid compounds from ethanol extract of red galangal rhizomes to compare their antibacterial properties with extracts formed into nanoparticles has been performed.
Vatara Artanta Silalahi, Enny Fachriyah, Pratama Jujur Wibawa   +2 more
doaj   +1 more source

A versatile standard for bathochromic fluorescence based on intramolecular FRET. [PDF]

, 2011
A perylene and a terrylene tetracarboxylic bisimide dyad was prepared in which an efficient energy transfer from the former to the latter is observed. The absorption spectrum of this compound covers a broad range.
Adachi, Andreas Walter, Dawson, Demas, Desilets, Erik Rosenbaum, Feiler, Heinz Langhals, Holtrup, Kaiser, Kalinin, Langhals, Langhals, Langhals, Langhals, Langhals, Langhals, Langhals, Langhals, Lennart B.-Å. Johansson, Levenberg, Melhuish, Nolde, Sakamoto, Weber, Wehmeier   +25 more
core   +1 more source