Synthesis and Cyclization of Some 5-Aminobenzimidazole and 5-Aminobenzotriazole Derivatives

Alkoxymethylene derivatives I of 2,4-pentanedione, 3-oxobutanenitrile, and methyl and ethyl 3-oxobutanoates with substituted 1-phenyl-5-aminobenzimidazoles and -benzotriazoles II give the products of nucleophilic substitution III and IV which, bearing ester groups, undergo thermal cyclizations to the corresponding 8-acetyl-3-phenyl-6,9-dihydroazolo[4,5-f]quinolin-9(3H)-ones V and VI. IR, UV, 1H and 13C NMR data are given.

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1-Carba-arachno-pentaborane(10) Derivatives

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19971254 ◽

1997 ◽

Vol 62 (8) ◽

pp. 1254-1262 ◽

Cited By ~ 19

Author(s):

Bernd Wrackmeyer ◽

Hans-Jörg Schanz

Keyword(s):

High Yield ◽

Exchange Reactions ◽

Nmr Data ◽

Substituted 1 ◽

C Nmr

The formation of organo substituted 1-carba-arachno-pentaborane(10) derivatives is shown to proceed in high yield via in situ generated 1,1,1-tris(diethylboryl)propane (2) from diethyl(propyn-1-yl)borane (1) by hydroboration with an excess of diethylborane (hydride bath). In the hydride bath, exchange reactions between 2 and other geminal bis(diethylboryl)alkanes take place until the carbaborane skeleton is formed. If tris(diethylboryl)methane is used under the same conditions, the corresponding 1-carba-arachno-pentaborane(10) derivatives 11 and 12 are formed in mixture with other unknown boranes or carboranes. 11B and 13C NMR data are presented to allow for straightforward identification of the 1-carba-arachno-pentaboranes(10).

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Zur Reaktion von 1-Sila-2,4-cyclohexadien mit tert-Butyllithium/Trimethylchlorsilan / On the Reaction of 1-Sila-2,4-cyclohexadiene with tert-Butyllithium/Trimethylchlorosilane

Zeitschrift für Naturforschung B ◽

10.1515/znb-1984-1012 ◽

1984 ◽

Vol 39 (10) ◽

pp. 1368-1374 ◽

Cited By ~ 3

Author(s):

Peter Jutzi ◽

Gabriele Berg ◽

Cornelius Otto ◽

Thomas Wippermann

Keyword(s):

Nucleophilic Substitution ◽

Bond Cleavage ◽

Lithium Hydride ◽

Pure Form ◽

Reaction Conditions ◽

Carbon Bond ◽

Nmr Data ◽

Silicon Carbon ◽

System 1 ◽

C Nmr

In the system 1-sila-2,4-cyclohexadiene (l)/tert-butyllithium/trimethylchlorosilane the following reaction types have been observed: nucleophilic substitution, metallation, addition of tert-butyllithium to the diene fragment, addition of lithium hydride to the diene fragment, silicon-carbon bond cleavage, and transmetallation. The resulting products 2-11 have been characterised by their 1H and 13C NMR data; the compounds 2, 3, 6, 8 and 10 could be isolated in a pure form. The relative quantities obtained of the compounds 2-11 depend on the reaction conditions (solvent, temperature, order of addition).

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Glucan isolated from leaves of Althaea officinalis L.

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19832082 ◽

1983 ◽

Vol 48 (7) ◽

pp. 2082-2087 ◽

Cited By ~ 6

Author(s):

Alžbeta Kardošová ◽

Jozef Rosík ◽

Rudolf Toman ◽

Peter Capek

Keyword(s):

Medicinal Plant ◽

Periodate Oxidation ◽

Linear Structure ◽

Water Soluble ◽

Partial Hydrolysis ◽

Methylation Analysis ◽

Glycosidic Bonds ◽

Nmr Data ◽

Althaea Officinalis ◽

C Nmr

A water-soluble low-molecular D-glucan was isolated from leaves of the medicinal plant marsh-mallow (Althaea officinalis L.). The results of methylation analysis, partial hydrolysis, periodate oxidation, and 13C NMR data indicated a virtually linear structure with α-(1→6) glycosidic bonds.

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Synthesis and characteristics of ethylenediamine-N,N'-di-S-α-isovalerate and isomers of its cobalt(III) complexes

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19820210 ◽

1982 ◽

Vol 47 (1) ◽

pp. 210-216 ◽

Cited By ~ 11

Author(s):

Milan Strašák ◽

František Bachratý ◽

Jaroslav Majer

Keyword(s):

Amino Acids ◽

Absolute Configuration ◽

Electronic Absorption ◽

Electronic Absorption Spectra ◽

Chemical Parameters ◽

Methyl Group ◽

Nmr Data ◽

Physico Chemical ◽

Natural Amino Acids ◽

C Nmr

The synthesis and physico-chemical parameters are described of a new complexone based on natural amino acids, viz. ethylenediamine-N,N'-di-S-α-isovalerate (SS-EDDIV). 1H- and 13C-NMR data revealed that the methyl group in the substance are not equivalent. The isomers of the cobalt(III) complex with the asymmetric tetradentate SS-EDDIV ligand were prepared and separated; their characteristics are given. The absolute configuration of two of the five theoretically feasible isomers was determined based on their electronic absorption spectra and circular dichroism data.

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Structural Investigations of C-Nitrosobenzenes. Part 3.1 Solid-state and Solution 13C NMR Studies, and Crystal Structure of E-(4-CIC6H4NO)2

Journal of Chemical Research ◽

10.1177/174751989902300316 ◽

1999 ◽

Vol 23 (3) ◽

pp. 202-203

Author(s):

Daniel A. Fletcher ◽

Brian G. Gowenlock ◽

Keith G. Orrell ◽

David C. Apperley ◽

Michael B. Hursthouse ◽

...

Keyword(s):

Crystal Structure ◽

Solid State ◽

13C Nmr ◽

Nmr Studies ◽

Structural Investigations ◽

Nmr Data ◽

C Nmr

Solid-state and solution 13C NMR data for the monomers and dimers of 3- and 4-substituted nitrosobenzenes, and the crystal structure of E-(4-CIC6H4NO)2 are reported.

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Assignment of 1 H- and 13 C-NMR data for four helminthosporol analogs with the bicyclo[3.2.1]oct-6-ene framework

Magnetic Resonance in Chemistry ◽

10.1002/mrc.4761 ◽

2018 ◽

Vol 56 (11) ◽

pp. 1130-1134

Author(s):

Kenji Tomita ◽

Sho Miyazaki ◽

Kazuo Furihata ◽

Masatoshi Nakajima ◽

Tadao Asami

Keyword(s):

Nmr Data ◽

C Nmr

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NMR-spektroskopische Untersuchungen an 1,1-Thiophendioxid und verwandten Verbindungen / NMR Spectroscopical Investigations of Thiophene 1,1-Dioxide and Related Compounds

Zeitschrift für Naturforschung B ◽

10.1515/znb-1984-0714 ◽

1984 ◽

Vol 39 (7) ◽

pp. 915-920 ◽

Cited By ~ 7

Author(s):

Herbert Meier ◽

Thomas Molz ◽

Heinz Kolshorn

Keyword(s):

Computer Simulation ◽

Chemical Shifts ◽

Coupling Constants ◽

Multiple Resonance ◽

Nmr Data ◽

Cyclic Diene ◽

Related Compounds ◽

C Nmr

The 1H and 13C NMR data of thiophene 1,1-dioxide (3) and related compounds, especially of the precursor 2 and the consecutive product 5 are evaluated by computer simulation and multiple resonance. Chemical shifts and coupling constants reveal that 3 has the character of a cyclic diene. Diatropic or paratropic effects can be excluded.

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New Method for Nucleophilic Substitution on Hexachlorocyclotriphosphazene by Allylamine Using an Algerian Proton Exchanged Montmorillonite Clay (Maghnite-H+) as a Green Solid Catalyst

BULLETIN OF CHEMICAL REACTION ENGINEERING AND CATALYSIS ◽

10.9767/bcrec.11.2.541.151-160 ◽

2016 ◽

Vol 11 (2) ◽

pp. 151 ◽

Cited By ~ 6

Author(s):

Lahouaria Medjdoub ◽

Belbachir Mohammed

Keyword(s):

Nucleophilic Substitution ◽

Room Temperature ◽

Montmorillonite Clay ◽

New Method ◽

Solid Catalyst ◽

H Nmr ◽

Flight Mass Spectrometry ◽

Crystalline Product ◽

First Time ◽

C Nmr

Nucleophilic substitution on hexachlorocyclotriphosphazene (HCCTP) with allylamine in order to give hexa(allylamino)cyclotriphosphazene (HACTP) is performed for the first time under mild conditions by using diethylether as solvent to replace benzene which is very toxic. The reaction time is reduced to half and also performed at room temperature but especially in the presence of an eco-catalyst called Maghnite-H+. This catalyst has a significant role in the industrial scale. In fact, the use of Maghnite is preferred for its many advantages: a very low purchase price compared to other catalysts, the easy removal of the reaction mixture. Then, Maghnite-H+ is became an excellent catalyst for many chemical reactions. The structure of HACTP synthesized in the presence of Maghnite-H+ to 5% by weight is confirmed by 1H-NMR, 13C-NMR, 31P-NMR (Nuclear magnetic resonance) and FTIR (Fourier Transform Infrared spectroscopy). MALDI-TOF (Matrix-Assisted Laser Desorption/Ionisation-time-of-flight mass spectrometry) is used to establish the molecular weight of HACTP which is 471 g/mol. DSC (Differential Scanning Calorimetery) and TGA (Thermogravimetric Analysis) show that HACTP is a crystalline product with a melting point of 88 °C. It is reactive after melting but is degraded from 230 °C. Copyright © 2016 BCREC GROUP. All rights reservedReceived: 28th September 2015; Revised: 5th December 2015; Accepted: 4th January 2016How to Cite: Medjdoub, L., Mohammed, B. (2016). New Method for Nucleophilic Substitution on Hexachlorocyclotriphosphazene by Allylamine Using an Algerian Proton Exchanged Montmorillonite Clay (Maghnite-H+) as a Green Solid Catalyst. Bulletin of Chemical Reaction Engineering & Catalysis, 11 (2): 151-160 (doi:10.9767/bcrec.11.2.541.151-160)Permalink/DOI: http://dx.doi.org/10.9767/bcrec.11.2.541.151-160

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Sur une nouvelle méthode de synthèse de δ-lactones cyclopenténiques

Canadian Journal of Chemistry ◽

10.1139/v86-136 ◽

1986 ◽

Vol 64 (4) ◽

pp. 831-836 ◽

Cited By ~ 2

Author(s):

Jean Claude Caille ◽

Michel Farnier ◽

Roger Guilard ◽

André Aubry ◽

Claude Lecomte

Keyword(s):

Mass Spectrometry ◽

Carbon Atom ◽

X Ray ◽

Nmr Data ◽

C Nmr

Synthesis of two cyclopentenic δ-lactones, 1,3,4,4a,5,6-hexahydrocyclopenta[c]pyran-1-one and its analogue possessing a cyclopentenyl group bonded to the carbon atom 4a is described, starting from the cyclopentanone or cyclopentylidene cyclopentanone. The remarkable reactivity of the tosylhydrazones allows transformation of these compounds into substituted cyclopentenes, which lead to δ-lactones by cyclization. The conditions of cyclization depend on the nature of the cyclopentanone. The structure of the two δ-lactones is established by 1H and 13C nmr data, mass spectrometry, and, in one case, by X-ray analysis.

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Synthesis of Some Novel Fused Imidazo [2, 1-b] [1, 3] Thiazole and Imidazo [2, 1-b] Thiazolo [5, 4-d] Isoxazole Derivatives

E-Journal of Chemistry ◽

10.1155/2012/896454 ◽

2012 ◽

Vol 9 (3) ◽

pp. 1518-1525 ◽

Cited By ~ 2

Author(s):

Hamid Reza Jaberi ◽

Hadi Noorizadeh

Keyword(s):

Acetic Acid ◽

Sodium Acetate ◽

Carbon Disulphide ◽

Thiazole Derivatives ◽

H Nmr ◽

Nmr Data ◽

Elemental Analyses ◽

New Compounds ◽

Isoxazole Derivatives ◽

C Nmr

In this work we describe the synthesis of some novel fused imidazo [2, 1-b] [1, 3] thiazole derivatives. The reaction of 1, 2-diaminoethane 1 with carbon disulphide in H2O/ETOH as solvent furnishes 4, 5-dihydro-1H-imidazol-2-thiol 2 under reflux condition. the reaction of 4,5-dihydro-1H-imidazol-2-thiol on treatment with ethylchloro acetate and aromatic aldehyde in presence of anhydrous sodium acetate and acetic acid as solvent to give (Z)-2-(arylidene)-5,6-dihydroimidazo [2,1-b] [1,3] thiazol-3(2H)-one 3a-j. Compounds 3a-j was condensed with hydroxylamine to give 3-(aryl)-2, 3, 6, 7-tetrahydroimidazo [2, 1-b] [1,3] thiazolo [5, 4-d] isoxazole 4a-j. The structures of the new compounds were established by elemental analyses, IR,1H NMR and13C NMR data.

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