Results 31 to 40 of about 1,879 (233)

Kinetically Stabilized Diarylpnictogenium Ions

ChemPlusChem, Volume 88, Issue 3, March 2023., 2023
The preparation and full characterization of the stibenium and bismuthenium ions completes the series of kinetically stabilized heavier pnictogenium ions [RindMesE]+ (E=P, As Sb, Bi). The different colours of the species within this series were attributed to energy differences of the LUMOs. Comparison with the bis(m‐terphenyl)‐substituted stibenium and
Marvin Janssen, Stefan Mebs, Jens Beckmann   +2 more
wiley   +1 more source

Crystal structure of ethyl 1′,1′′-dimethyl-2′′,3-dioxo-3H-dispiro[benzo[b]thiophene-2,3′-pyrrolidine-2′,3′′-indoline]-4′-carboxylate

Acta Crystallographica Section E: Crystallographic Communications, 2015
In the title compound, C23H22N2O4S, the pyrrolidine ring has an envelope conformation with the spiro C atom, shared with the indoline ring system, as the flap. The mean planes of the benzothiophene and indoline ring systems are inclined to the mean plane
M. P. Savithri, M. Suresh, R. Raghunathan, R. Raja, A. SubbiahPandi   +4 more
doaj   +1 more source

The Effect of Benzannulation on the Structures, Reactivity and Molecular Dynamics of Indenes, Pentalenes, Azulenes and Related Molecules

Molecules, 2022
The stabilising effect of benzannulation on isoindenes formed in the course of sigmatropic shifts of (C5H5)Fe(CO)2 or of organo-silyl groups, and on exocyclic allyl intermediates in the course of haptotropic shifts of organometallic fragments over ...
Michael J. McGlinchey
doaj   +1 more source

Syntheses of dispiro[2.1.4.1]decane and dispiro[2.0.3.3]decane

Tetrahedron Letters, 2000
Abstract Efficient syntheses of the hitherto unknown hydrocarbons dispiro[2.1.4.1]decane and dispiro[2.0.3.3]decane have been realized through reaction sequences involving spiro[3.4]octan-2-one and spiro[3.4]octan-5-one as key intermediates.
John E Baldwin, Maryann E Keene, Rajesh Shukla   +2 more
openaire   +1 more source

Crystal structure and Hirshfeld surface analysis of 4′-(2-chlorophenyl)-1′-methyl-3′′-phenyl-7′′,8′′-dihydro-5′′H-dispiro[indoline-3,2′-pyrrolidine-3′,6′′-isoquinoline]-2,5′′-dione

Acta Crystallographica Section E: Crystallographic Communications, 2018
In the title dispiro compound, C32H26ClN3O2, the cyclohexanone ring of the isoquinoline unit has a distorted envelope conformation, with the methylene C atom adjacent to the spiro C atom as the flap.
R. Vishnupriya, C. Selva Meenatchi, J. Suresh, R. V. Sumesh, R. Ranjith Kumar, P. L. Nilantha Lakshman   +5 more
doaj   +1 more source

Crystal structure of ethyl 2′′,3-dioxo-7′,7a'-dihydro-1′H,3H,3′H-dispiro[benzo[b]thiophene-2,6′-pyrrolo[1,2-c]thiazole-5′,3′′-indoline]-7′-carboxylate

Acta Crystallographica Section E: Crystallographic Communications, 2015
In the title compound, C23H20N2O4S2, the central pyrrolidine ring adopts an envelope conformation with the spiro C atom, shared with the benzothiophene ring system, as the flap.
M. P. Savithri, M. Suresh, R. Raghunathan, R. Raja, A. SubbiahPandi   +4 more
doaj   +1 more source

Electro‐Synthesis of Organic Compounds with Heterogeneous Catalysis

Advanced Science, Volume 10, Issue 1, January 4, 2023., 2023
In this review, the most recent advances in synthesizing value‐added chemicals by heterogeneous catalysis are summarized, and an overview of electrocatalytic oxidation and reduction processes as well as paired electrocatalysis is also provided. Abstract Electro‐organic synthesis has attracted a lot of attention in pharmaceutical science, medicinal ...
Tariq Ali, Haiyan Wang, Waseem Iqbal, Tariq Bashir, Rahim Shah, Yong Hu   +5 more
wiley   +1 more source

Crystal structure of ethyl 5′′-fluoro-2′′,3-dioxo-6′,7′,8′,8a'-tetrahydro-2′H,3H,5′H-dispiro[benzo[b]thiophene-2,1′-indolizine-3′,3′′-indoline]-2′-carboxylate

Acta Crystallographica Section E: Crystallographic Communications, 2015
In the title compound, C25H23FN2O4S, the fused piperidine ring of the octahydroindolizine ring system adopts a chair conformation and the five-membered ring has a twisted conformation on the N—C(spiro) bond.
R. Raja, J. Govindaraj, M. Suresh, R. Raghunathan, A. SubbiahPandi   +4 more
doaj   +1 more source

Synthesis and Biological Evaluation of S-, O- and Se-Containing Dispirooxindoles

Molecules, 2021
A series of novel S-, O- and Se-containing dispirooxindole derivatives has been synthesized using 1,3-dipolar cycloaddition reaction of azomethine ylide generated from isatines and sarcosine at the double C=C bond of 5-indolidene-2-chalcogen-imidazolones
Maksim Kukushkin, Vladimir Novotortsev, Vadim Filatov, Yan Ivanenkov, Dmitry Skvortsov, Mark Veselov, Radik Shafikov, Anna Moiseeva, Nikolay Zyk, Alexander Majouga, Elena Beloglazkina   +10 more
doaj   +1 more source

Copper‐Catalyzed Enantioselective Hydrosilylation of gem‐Difluorocyclopropenes Leading to a Stereochemical Study of the Silylated gem‐Difluorocyclopropanes

Chemistry – A European Journal, Volume 28, Issue 32, June 7, 2022., 2022
The copper‐catalyzed enantioselective hydrosilylation of gem‐difluorocyclopropenes providing the chiral gem‐difluorocyclopropanes is presented. The use of copper(I) chloride, chiral ligands including bidentate BINAPs and monodentate phosphoramidites, and silylborane Me2PhSi‐Bpin accompanying NaOtBu in methanol was appropriate for the enantioselective ...
Keisuke Sekine, Dai Akaishi, Kakeru Konagaya, Shigekazu Ito   +3 more
wiley   +1 more source