Organic chemistry

SYNTHESIS AND IR, NMR CARACTERISATION OF NEW P-(N,N-DIPHENYLAMINO) CHALCONES

Author(s):

Sîrbu Dumitru, Marin Ion

Field: Organic chemistry
Type: Research paper
Issue: 2011 Volume 6, no.1
Pages: 86-89

Keywords: chalcone, isothiocyanat, imidazole, NMR, IR.
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DOI: dx.doi.org/10.19261/cjm.2011.06(1).05

Graphical Abstract: This article reports on the high yield synthesis and novel chalcones with isothiocyanate and imidazol groups. The synthesis was started from N,N-diphenilamine and finished with 4-(N,N-diphenylamino)-4’-(2-thioxo-imidazolidin-4-one)-chalcone, where the cheap and accessible reagents were used.

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FLUORESCENT N-HETEROCYCLES VIA ONE-POT TANDEM REACTIONS

Author(s):

Rodica Dinica, Bianca Furdui, Geta Cârâc and Constantin Stanciu

Field: Organic chemistry
Type: Research paper
Issue: 2009 Volume 4, no.2
Pages: 82-85

Keywords: microwave, “one-pot” reaction, indolizine.
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Abstract (JPEG)

DOI: dx.doi.org/10.19261/cjm.2009.04(2).06

Graphical Abstract: Substituted indolizines are very attractive heterocyclic units. On developing efficient methods toward differently substituted indolizines, we were particularly interested in elaborating efficient approaches toward three-component reaction of these compounds which are very interested from the point of view fluorescent properties. The microwave-mediated three component reaction of acyl bromide, bipyridine and dipolarophyl is catalyzed by basic alumina to give corresponding bis-indolizines in excellent yields in a one –pot reaction.

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SYNTHESIS OF TRIPHENYLAMINE-BASED RHOMBIMINE MACROCYCLE BY [2+2] CYCLOCONDENSATION REACTION BETWEEN (1R,2R)-DIAMINOCYCLOHEXANE AND 4,4’-DIFORMYL TRIPHENYLAMINE

Author(s):

Loredana Vacareanu (Stafie), Virgil Barboiu, Daniel Timpu, Mircea Grigoras

Field: Organic chemistry
Type: Research paper
Issue: 2009 Volume 4, no.1
Pages: 97-102

Keywords: triphenylamine group, Schiff base macrocycle, rhombimine.
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Abstract (JPEG)

DOI: dx.doi.org/10.19261/cjm.2009.04(1).05

Graphical Abstract: A Schiff base macrocycle with persistent rhomboidal shape was synthesized in excellent yield through [2+2] condensation reaction between (R,R)-1,2-diaminocyclohexane and 4,4’-diformyltriphenylamine. The dimeric macrocylic structure was proved by electrospray ionization mass spectrometry (ESI-MS), 1H-NMR, and FTIR spectroscopy. The complexation properties were evidenced by UV absorption.

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EMERGING CHEMISTRY ON THE OIL OF THE FUTURE. REVIEW PAPER ON DAN NOCERA’S RESEARCH

Author(s):

Daniela Duca

Field: Organic chemistry
Type: Review
Issue: 2008 Volume 3, no.2
Pages: 47-54

Keywords: renewable energy, photocatalysis, porphyrin macrocycles, Rh bimetallic complexes.
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Abstract (JPEG)

DOI: dx.doi.org/10.19261/cjm.2008.03(2).11

Graphical Abstract: The paper is an overview of Daniel Nocera’s work towards obtaining energy from the splitting of water. The review describes the challenge of storing high energy bonds and presents some of the important advances the researcher managed to accomplish.

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NEW ROOM TEMPERATURE LIQUIDS: SYNTHESIS AND CHARACTERIZATION

Author(s):

Macaev Fliur, Munteanu Viorica, Stingaci Eugenia, Barba Alic, Pogrebnoi Serghei

Field: Organic chemistry
Type: Short communication
Issue: 2007 Volume 2, no.1
Pages: 119-122

Keywords: organic synthesis, ionic liquids, epoxides, nitriles, allylimidazoles.
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Abstract (JPEG)

DOI: dx.doi.org/10.19261/cjm.2007.02(1).03

Graphical Abstract: Room temperature ionic liquids (ILs) have been recognized as a new generation of solvents for “green chemistry” and represent remarkably promising classes of technologically useful and fundamentally interesting materials [1-6]. Most of them are

quaternary imidazolium cations with inorganic counterions. Cation in these salts is appended to the organic group (usually saturated hydrocarbon fragments). However, some problems regarding the functionalization [2,7], coordination properties [4] of ILs still remain to be solved. It seems to us that functionalization of imidazoles by ethylcarbonitrile, allyl, 2,3-epoxypropyl fragments will lead to new properties of synthesized ILs. There are no literature data on use of 2-(1H-1-imidazolyl)ethylcarbonitrile 4 for synthesis of imidazolium salts with ILs properties.

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WHAT CAN BE DONE WITH THE ACETYL GROUP OF ARYL-1-ETHANONES?

Author(s):

Fliur Macaev

Field: Organic chemistry
Type: Review
Issue: 2006 Volume 1, no.1
Pages: 36-49

Keywords: organic synthesis, aryl-1-ethanones, acetyl group.
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Abstract (JPEG)

DOI: dx.doi.org/10.19261/cjm.2006.01(1).10

Graphical Abstract: Literature data on utilization of acetyl group of aryl-1-ethanones (acetophenones) for the synthesis of organic compounds is generalized. Different approaches of preparation of aromatic compounds by chemical transformations of methyl as well as keto- group of titled compounds are systematized. Examples of the synthesis of organic compounds based on products of primary transformations of aryl-1-ethanones are considered.

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Chemistry Journal of Moldova