Results 31 to 40 of about 4,192 (189)

Synthesis and characterization of Novel Schiff bases and evaluation of Corrosion inhibitors and biological activity

مجلة علوم ذي قار, 2019
Novel Schiff bases have been prepared from (6R,7R)-3-[( acetyloxy)methyl]-7-[[( Z)-2-(2aminothiazol-4-yl)-2-(methoxyimino)acetyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]-oct-2-ene-2carboxylate sodium and 2,4-dihydroxy benzaldehyde ,3-methoxy-4-hydroxy
Ahmed M. Jassim
doaj   +4 more sources

2,4-Bis(2-methylphenyl)-3-azabicyclo[3.3.1]nonan-9-one O-methyloxime

Acta Crystallographica Section E, 2010
The molecule of the title compound, C23H28N2O, exists in a twin-chair conformation, with equatorial orientation of the ortho-tolyl groups on both sides of the secondary amino group. The title oxime compound and its ketone precursor 2,4-bis(2-methylphenyl)
P. Parthiban, V. Ramkumar, Yeon Tae Jeong   +2 more
doaj   +1 more source

Copper-Catalyzed Tandem Cross-Coupling/[2 + 2] Cycloaddition of 1,6-Allenynes with Diazo Compounds to 3‑Azabicyclo[5.2.0] Ring Systems

, 2019
An unprecedented copper-catalyzed tandem cross-coupling/[2 + 2] cycloaddition of 1,6-allenynes with diazo compounds was reported, chemo- and regioselectively providing 3-azabicyclo[5.2.0] frameworks in moderate to excellent yields under mild reaction ...
Shiyong Peng (1508452), Qing Li (84975), Nuan Chen (6851615), Ting Zhou (38572), Jian Wang (5901), Min He (44052), Ming Lang (3757117), Hongguang Li (829886)   +7 more
core   +1 more source

A Mononuclear Ruthenium(V)‐Imido Complex With Hydrogen Bonding in the Second Coordination Sphere Forming Aziridines Without N‐Substituents From Alkenes in Water

Angewandte Chemie International Edition, EarlyView.
This study employs a RuV═NH complex with hydrogen‐bonding (HB) sites in the SCS to afford non‐N‐substituted aziridines selectively. Nitrogen‐atom transfer occurs from the RuV═NH complex to alkenes in water to produce aziridine derivatives in high yields.
Tomoya Ishizuka, Chisato Ogawa, Yoshihito Shiota, Shunsuke Nozawa, Hiroaki Kotani, Shin‐ichi Adachi, Kazunari Yoshizawa, Takahiko Kojima   +7 more
wiley   +1 more source

Modified Synthesis of Four Kinds of Azabicyclo Compounds

Chinese Journal of Applied Chemistry, 2012
Azabicyclo compounds of 1,4-benxodiazine,pyridopyrazine,1H-benzimidazole,3H-imidazopyridine were prepared from o-phenylenediamine or 2,3-diaminopyridine reacted with carbonyl compounds.The effects of reaction medium,pH,time and other factors on the reactions were invesitigated.The results showed that the yield of pyridopyrazine could reach 89.4% when ...
openaire   +1 more source

Synthesis of novel azabicyclo derivatives containing a thiazole moiety and their biological activity against pine-wood nematodes

, 2019
To explore a new skeleton with nematicidal activity, a series of novel azabicyclo derivatives containing a thiazole moiety were designed, synthesized and evaluated for their nematicidal activities.
Aoyun Lu (8171343), Gonghua Song (1938601), Yanqiu Zhang (4268377), Yanqing Peng (3335247), Hui Li (32376)   +4 more
core   +1 more source

Domino reactions of 2H-azirines with acylketenes from furan-2,3-diones: Competition between the formation of ortho-fused and bridged heterocyclic systems

Beilstein Journal of Organic Chemistry, 2014
3-Aryl-2H-azirines react with acylketenes, generated by thermolysis of 5-arylfuran-2,3-diones, to give bridged 5,7-dioxa-1-azabicyclo[4.4.1]undeca-3,8-diene-2,10-diones and/or ortho-fused 6,6a,12,12a-tetrahydrobis[1,3]oxazino[3,2-a:3′,2′-d]pyrazine-4,10 ...
Alexander F. Khlebnikov, Mikhail S. Novikov, Viktoriia V. Pakalnis, Roman O. Iakovenko, Dmitry S. Yufit   +4 more
doaj   +1 more source

Methyl on the Bridge: 2‐Methyl Propellane as Precursor for 1,3‐Substituted 2‐Methylated Bicyclo[1.1.1]Pentanes

Chemistry – A European Journal, EarlyView.
The synthesis of 2‐methyl propellane and its conversion to various 1,2‐ and 1,2,3‐di‐ and trisubstituted bicyclopentanes is reported. Abstract Bicyclo[1.1.1]pentanes (BCPs) have emerged as isosteric replacements for mono‐ and para‐substituted benzene rings in medicinal and materials applications, involving substitution at the BCP bridgehead (1,3 ...
Sean R. Verschaeve, Mariana Gomes Manso, Tibo Van Eeckhoorn, Mark E. Light, Bruno Linclau   +4 more
wiley   +1 more source

Investigation of the role of stereoelectronic effects in the conformation of piperidones by NMR spectroscopy and X-ray diffraction

Beilstein Journal of Organic Chemistry, 2015
This paper reports the synthesis of a series of piperidones 1–8 by the Mannich reaction and analysis of their structures and conformations in solution by NMR and mass spectrometry.
Cesar Garcias-Morales, David Ortegón-Reyna, Armando Ariza-Castolo   +2 more
doaj   +1 more source

Photochemistry of Aromatic N‐Oxides in Water Probed by Time‐Resolved X‐ray Absorption Spectroscopy

Chemistry – A European Journal, EarlyView.
Time‐resolved XAS at the nitrogen and oxygen K‐edges is applied to the photorearrangement of two N‐oxides in water. Pyridine N‐oxide rapidly forms the oxaziridine isomer. Pyridazine N‐oxide undergoes ring opening to the diazo compound, without any evidence of intermediates.
Maximilian Paradiz Domínguez, Robby Büchner, Mattis Fondell, Albert M. Brouwer   +3 more
wiley   +1 more source