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Molecules, Volume 2, Issue 11 (November 1997) – 7 articles , Pages 158-179, Articles M40-M42

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Open AccessShort Note
4-Dodecyl-6-methyl-2-morpholone
Molecules 1997, 2(11), M42; https://doi.org/10.3390/M42 - 18 Nov 1997
Viewed by 2015
Abstract
2-Morpholones may be synthesized from the corresponding beta-amino alcohols by heating with an alpha-halo ester [1].[...] Full article
(This article belongs to the Section Molbank Section of Molecules, 1997-2001)
Open AccessShort Note
3-Dodecyl-5-methyl-2-oxazolidinone
Molecules 1997, 2(11), M41; https://doi.org/10.3390/M41 - 18 Nov 1997
Viewed by 2139
Abstract
2-Oxazolidinones can be synthesized from appropriate beta-amino alcohols by the action of methyl or ethyl trichloroacetate [1].[...] Full article
(This article belongs to the Section Medicinal Chemistry)
Open AccessShort Note
3-Dodecyl-5-methyl-2-oxazolidinthione
Molecules 1997, 2(11), M40; https://doi.org/10.3390/M40 - 18 Nov 1997
Viewed by 1809
Abstract
Oxazolidin-2-thiones can be prepared by the cyclization reaction of corresponding beta-amino alcohols with carbon disulfide or thiophosgene [1,2].[...] Full article
(This article belongs to the Section Molbank Section of Molecules, 1997-2001)
Open AccessArticle
Dehydration of Aromatic Heterocyclic Carboxamides to Aromatic Heterocyclic Carbonitriles
Molecules 1997, 2(11), 176-179; https://doi.org/10.3390/21100176 - 15 Nov 1997
Cited by 5 | Viewed by 7629
Abstract
Phosphorus pentoxide is commonly used for the dehydration of heterocyclic carboxamides to the corresponding nitriles. In this report, the use of cyanuric chloride/N,N-disubstituted formamide for this reaction is described. The advantages of this procedure are mild reaction conditions and good yields. Depending on [...] Read more.
Phosphorus pentoxide is commonly used for the dehydration of heterocyclic carboxamides to the corresponding nitriles. In this report, the use of cyanuric chloride/N,N-disubstituted formamide for this reaction is described. The advantages of this procedure are mild reaction conditions and good yields. Depending on the reaction conditions and the structures of the amides, the nitriles are obtained in yields from 51% to 99%. Several of the oxazole carbonitriles synthesized by this procedure have not yet been described. Full article
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Open AccessArticle
Experimental Studies on the UV-Spectra of Several Substituted Pyridine N-Oxides and Conjugated Cationic Acids in Acetonitrile
Molecules 1997, 2(11), 169-175; https://doi.org/10.3390/21100169 - 15 Nov 1997
Cited by 3 | Viewed by 5021
Abstract
The ultraviolet spectra of heterocyclic N-oxides of pyridine N-oxide series and the conjugated cationic acids (simple cations of protonated N-oxides) in acetonitrile as the representative of polar aprotic solvents, were determined. The obtained spectra of N-oxides studied (mainly tri-substituted pyridine N-oxides) and their [...] Read more.
The ultraviolet spectra of heterocyclic N-oxides of pyridine N-oxide series and the conjugated cationic acids (simple cations of protonated N-oxides) in acetonitrile as the representative of polar aprotic solvents, were determined. The obtained spectra of N-oxides studied (mainly tri-substituted pyridine N-oxides) and their cations obtained by the protonation of free N-oxides by the excess of perchloric acid, have been collected and discussed. Taking into account the spectroscopic results, a scheme of acid-base equilibria in polar aprotic solvents has been discussed. The influence of the traces of water on acid-base equilibria in nonaqueous media has been stressed. Full article
Open AccessArticle
Chemical Composition of the Essential Oil of Hyptis Suaveolens
Molecules 1997, 2(11), 165-168; https://doi.org/10.3390/21100165 - 15 Nov 1997
Cited by 42 | Viewed by 5651
Abstract
The chemical composition of Hyptis suaveolens was investigated and twenty three compounds were abundant enough to be identified by GC-MS. Full article
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Open AccessArticle
Some Terpenes and Related Derivatives Synthesized in Cold Plasma Systems
Molecules 1997, 2(11), 158-164; https://doi.org/10.3390/21100158 - 15 Nov 1997
Cited by 6 | Viewed by 5354
Abstract
The synthesis of bicyclo-[2.2.1]-heptane and bicyclo-[7.2.0]-undec-4-ene derivatives under cold plasma conditions are reported. The reaction systems involve gaseous mixtures at an interface with ice surfaces. The reactions are sensitive to the feed mixture and the ice trapped compounds. Full article
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