One-Pot Synthesis of Lanthanide and Yttrium Cryptates Containing Pyridine Units

1997 ◽  
Vol 52 (10) ◽  
pp. 1273-1277 ◽  
Author(s):  
Fernando Avecilla ◽  
Rufina Bastida ◽  
Andrés de Blas ◽  
Eugenia Carrera ◽  
David E. Fenton ◽  
...  
Keyword(s):  
Schiff Base ◽  
Nmr Spectroscopy ◽  
Elemental Analysis ◽  
Molar Conductivity ◽  
One Pot ◽  
H Nmr ◽  
One Pot Synthesis ◽  
Step Procedure ◽  
One Step ◽  
High Yields

Complexes of yttrium (III) and lanthanide(III) ions with an axial macrobicycle derived from the 2+3 Schiff-base condensation of tris(2-aminoethyl)amine with 2,6-diformylpyridine have been prepared in high yields using a one-step procedure. The complexes, with formula [M2L](NO3)6 · xH2O · ySolv, (M = Y, La - Lu, except Pm) and [M 2L](ClO4)6 · xH2O · ySolv, (M = La - Er, except Pm ), have been characterised by elemental analysis, molar conductivity, mass, IR and 1H NMR spectroscopy.

scholarly journals An Efficient One Pot Synthesis of some New 1,4-Dihydropyridine Derivatives Using Multicomponent Reaction

2015 ◽  
Vol 57 ◽  
pp. 45-50
Author(s):  
Devang R. Prajapati ◽  
Hardik K. Senjani ◽  
Yogesh T. Naliapara
Keyword(s):  
Nmr Spectroscopy ◽  
Multicomponent Reaction ◽  
Elemental Analysis ◽  
One Pot ◽  
H Nmr ◽  
One Pot Synthesis ◽  
Target Molecules ◽  
Dihydropyridine Derivatives ◽  
C Nmr

Synthesize target molecules, multicomponent reaction of 4-(4-aminophenyl) morpholin-3-one with various pyrazole aldehydes and ethylacetoacetate or methylacetoacetate afforded various 1,4-dihydropyridines derivatives. The newly synthesized compounds were characterized by IR, Mass, 1H NMR, 13C NMR spectroscopy and elemental analysis.

scholarly journals Synthesis of cis, cis-1,3,5-trisubstituted cyclohexane based chelators with polyfunctional pendant arms

2005 ◽  
Vol 2005 (1) ◽  
pp. 43-45 ◽  
Author(s):  
Minati Baral ◽  
B.K. Kanungo ◽  
Peter Moore
Keyword(s):  
Schiff Base ◽  
Nmr Spectroscopy ◽  
Organic Compounds ◽  
Elemental Analysis ◽  
H Nmr ◽  
Benzenetricarboxylic Acid ◽  
New Compounds ◽  
Pendant Arms ◽  
C Nmr

Some novel organic compounds of the type: cis, cis-1,3,5-tris(X)cyclohexane, where X= –CONH(CH2)2NH2, –CONH(CH2)3NH2, –CONH(CH2)2NCH –C6H4OH, CONH(CH2)3NCHC6H4OH, which are expected to function as potential polydentate chelators have been synthesised from 1,3,5-benzenetricarboxylic acid through multi-steps reactions. 1,3,5-benzenetricarboxylic acid was reduced to cis, cis-1,3,5-tris(ethylcarboxylate)cyclohexane, which on reaction with excess of 1,2-diaminoethane and 1,2-diaminopropane afforded two new compounds. Condensation of the obtained derivatives with three equivalents of salicylaldehyde resulted the formation of two new Schiff base compounds. All the compounds were characterised by a combination of elemental analysis, mass, IR, UV-Vis, 1H NMR and 13C NMR spectroscopy.

scholarly journals Montmorillonite K-10 supported one-pot synthesis of some symmetric diimides and 3a,4,7,7a-tetrahydroisoindole-1,3-dione derivatives under solvent-free conditions using microwaves

2005 ◽  
Vol 70 (4) ◽  
pp. 579-583 ◽  
Author(s):  
Davood Habibi ◽  
Omid Marvi
Keyword(s):  
Nmr Spectroscopy ◽  
Maleic Anhydride ◽  
Microwave Irradiation ◽  
Elemental Analysis ◽  
1H Nmr Spectroscopy ◽  
Solvent Free ◽  
One Pot ◽  
Solvent Free Conditions ◽  
High Yields ◽  
Aromatic And Aliphatic Amines

The syntheses of cis-3a,4,7,7a-tetrahydroisoindole-1,3-dione derivatives and some cyclic diimides were performed by the reaction of different aromatic and aliphatic amines and diamines with cis-1,2,3,6-tetrahydrophthalic anhydride and maleic anhydride on montmorillonite K-10 under microwave irradiation and solvent- free conditions. The desired attractive products were obtained in high yields and characterized by elemental analysis aswell as by IR and 1H-NMR spectroscopy.

Regio- And Stereoselective Addition Of Imides To Ethyl 3-Phenyl-2- Propynoate In The Presence Of Triphenylphosphine. Single Crystal X-Ray Structure Of Ethyl (Z)-2-(1,3-Dioxo-1,3,3A,4,7,7A-Hexahydro-2H-Isoindol- 2-Yl)-3-Phenyl-2-Propenoate

2007 ◽  
Vol 62 (6) ◽  
pp. 829-834 ◽  
Author(s):  
Amir Tofangchi Mahyaria ◽  
Nahid Shajari ◽  
Ali Reza Kazemizadeh ◽  
Katarzyna Ślepokura ◽  
Tadeusz Lis ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Structural Analysis ◽  
Single Crystal ◽  
Structure Determination ◽  
One Pot ◽  
X Ray ◽  
One Pot Synthesis ◽  
Stereoselective Addition ◽  
High Yields ◽  
C Nmr

A one-pot synthesis of sterically congested N-vinyl imides in fairly high yields by the reaction of ethyl 3-phenyl-2-propynoate, imides and triphenylphosphine is reported. The structures of these compounds were confirmed by IR, 1H, and 13C NMR spectroscopy, and by a single crystal X-ray structure determination. The structural analysis of the products indicated that the reaction is regioand stereoselective

scholarly journals One-pot synthesis and structure of isomeric aryl-substituted triazolohexahydroquinazolines

2021 ◽  
Vol 21 (2) ◽  
pp. 128-133
Author(s):  
Natalia O. Vasil’kova ◽  
◽  
Darya M. Demidova ◽  
Adel’ P. Kriven’ko ◽  
◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Nmr Spectroscopy ◽  
Elemental Analysis ◽  
Two Dimensional ◽  
One Pot ◽  
General Direction ◽  
One Dimensional ◽  
One Pot Synthesis ◽  
Composition And Structure ◽  
Selective Process

Aryl-substituted triazolohexahydroquinazolines have been synthesized by means of three-component condensation of pnitro(pbromo) benzaldehydes, cyclohexanone, 1,2,4-triazol-3-amine. A scheme of the reaction mechanism is proposed, which makes it possible to explain the features of the behavior of p-nitro(bromo) benzaldehydes in condensation reactions in comparison with their ortho-substituted analogs. It has been found that the movement of the substituent from the ortho- tо -para-position of the benzene ring while maintaining the general direction of the reaction has a decisive effect on the number and ratio of the formed isomers and leads to the absence of hydroxylated forms of triazolohexahydroquinazolines. The composition and structure of the products have been confirmed by the data of elemental analysis, IR and one-dimensional, two-dimensional NMR spectroscopy. One-pot synthesis of aryl-substituted triazohexahydroquinazolines is a non-selective process that leads to a mixture of isomers, the structure and ratio of which is determined by the nature and position of the substituent groups in the aldehyde component.

Synthesis of Some 2-Aminonitroethanes via Silica Gel-Catalyzed Nitro-Mannich Reaction

2006 ◽  
Vol 61 (9) ◽  
pp. 1162-1165 ◽  
Author(s):  
Ali S. Mahasneh
Keyword(s):  
Silica Gel ◽  
Elemental Analysis ◽  
Mannich Reaction ◽  
Nmr Spectra ◽  
One Pot ◽  
H Nmr ◽  
High Yields ◽  
C Nmr

Abstract A direct one pot, three-component nitro-Mannich reaction of a nonenolizable aldehyde, aniline or one of its ring-substituted derivatives and nitromethane was carried out on silica gel surface. The products of the reaction, 2-aminonitroethane, were obtained in high yields. IR, 1H NMR, 13C NMR spectra and elemental analysis confirmed the structures of the products.

One-pot synthesis of terpyridines and macrocyclization to C3-symmetric cyclosexipyridines

2003 ◽  
Vol 81 (3) ◽  
pp. 209-218 ◽  
Author(s):  
Lucie Masciello ◽  
Pierre G Potvin
Keyword(s):  
Amorphous Solids ◽  
One Pot ◽  
H Nmr ◽  
One Pot Synthesis ◽  
Low Concentrations ◽  
One Step

Four examples of 2,6-dicinnamoylpyridines were obtained in 60–65% yields in condensations of commercially available 2,6-diacetylpyridine and benzaldehydes in 1:2 stoichiometry. At 2:1 ratios, four related 6,6''-diacetylated-4'-arylterpyridines were isolated in 70–73% yields in one-pot condensations in the presence of NH3. 4,4'-Azo benzaldehyde, prepared from nitrobenzaldehyde in three steps and 40% overall yield was similarly converted to a novel azo-linked bis(terpyridine) in 50% yield in a reaction that assembles seven molecules in one step. The 6,6''-diacetylated-4'-arylterpyridines and the correspondingly substituted 2,6-dicinnamoylpyridines were condensed in 1:1 ratio together with NH3 to form 4,4'',4IV-triarylcyclosexipyridines in 22–26% yields. These were obtained as mixed Na+ and K+ complexes and were insoluble amorphous solids, except for one example bearing 4-neopentoxyphenyl substituents. 1H NMR showed that the 4,4'',4IV-tri(4-neopentoxyphenyl)cyclosexipyridine complexes form aggregates in solution and at low concentrations show twofold symmetry arising from a loss of planarity.Key words: terpyridines, 4'-aryl-6,6''-diacetylterpyridines, azo-bisterpyridine, cyclosexipyridines, macrocyclization.

A Speedy One-Pot Synthesis of Second-Generation Ionic Liquids Under Ultrasound and/or Microwave Irradiation

2007 ◽  
Vol 60 (12) ◽  
pp. 946 ◽  
Author(s):  
Giancarlo Cravotto ◽  
Luisa Boffa ◽  
Jean-Marc Lévêque ◽  
Julien Estager ◽  
Micheline Draye ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Microwave Irradiation ◽  
Second Generation ◽  
Exchange Chromatography ◽  
Conventional Heating ◽  
One Pot ◽  
One Pot Synthesis ◽  
Menshutkin Reaction ◽  
One Step ◽  
High Yields

The present work describes an efficient one-pot synthesis of second-generation ionic liquids (ILs), combining in one step the Menshutkin reaction and anion metathesis. Working in a closed vessel under microwaves, or better still under simultaneous ultrasound and/or microwave irradiation, in a few minutes a series of ILs with 1-methylimidazole or pyridine cores were obtained in high yields (80–97% isolated). Under conventional heating, ILs could not be prepared in one pot in acceptable times and yields, whereas our protocol, carried out with commercially available equipment, was highly effective and reproducible. Moreover, 1H NMR analysis and ion-exchange chromatography showed that the present solventless procedure afforded satisfyingly pure ILs.

scholarly journals Microwave Induced Facile One-Pot Access to Diverse 2-Cyanobenzothiazole-A Key Intermediate for the Synthesis of Firefly Luciferin

2015 ◽  
Vol 44 ◽  
pp. 81-89 ◽  
Author(s):  
Neelam P. Prajapati ◽  
Rajesh H. Vekariya ◽  
Hitesh D. Patel
Keyword(s):  
Microwave Irradiation ◽  
Elemental Analysis ◽  
High Purity ◽  
Mass Spectral Data ◽  
One Pot ◽  
Mass Spectral ◽  
H Nmr ◽  
Solvent Free Conditions ◽  
Firefly Luciferin ◽  
One Step

An eco-friendly one-step preparation of various substituted 2-cyanobenzothiazole by condensation of corresponding substituted ortho-aminothiophenol with ethyl cyanoformate, employing an effective amount of Lawesson’s reagent, under microwave irradiation (MWI) and solvent free conditions is presented. The structures of the compounds were elucidated with the aid of elemental analysis, IR, 1H-NMR and mass spectral data. The targeted various substituted 2-cyanobenzothiazole are obtained in good yields and high purity.

scholarly journals Simple and Efficient Three Component One-Pot Synthesis of Pyrazolo[1,5,a]Pyrimidines

2014 ◽  
Vol 41 ◽  
pp. 73-81
Author(s):  
Anil R. Morabia ◽  
Yogesh T. Naliapara
Keyword(s):  
Fourier Transform ◽  
Boric Acid ◽  
Elemental Analysis ◽  
One Pot ◽  
Aryl Aldehydes ◽  
H Nmr ◽  
Reaction Condition ◽  
One Pot Synthesis ◽  
C Nmr ◽  
Operational Simplicity

A series of novel 5-(2-bromophenyl)-N-cyclohexyl-2-(methylthio)-6-nitro-7-phenyl-4,7-dihydropyrazolo [1,5-a] pyrimidine-3-carboxamides were synthesized by a one-pot reaction of 5-amino-N-cyclohexyl-3-(methylthio)-1H-pyrazole-4-carboxamide, 1-(2-bromophenyl)-2-nitroethanone and aryl aldehydes in the presence of boric acid in water at refluxing temperature. Structures of compounds were demonstrated by Fourier transform infrared, 1H NMR, 13C NMR and elemental analysis. The advantages of this method are mild reaction condition, good yields, and operational simplicity.

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