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

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Research

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Open AccessArticle Some Terpenes and Related Derivatives Synthesized in Cold Plasma Systems
Molecules 1997, 2(11), 158-164; doi:10.3390/21100158
Received: 25 August 1997 / Accepted: 24 October 1997 / Published: 15 November 1997
Cited by 2 | PDF Full-text (70 KB)
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
Open AccessArticle Chemical Composition of the Essential Oil of Hyptis Suaveolens
Molecules 1997, 2(11), 165-168; doi:10.3390/21100165
Received: 25 August 1997 / Accepted: 24 October 1997 / Published: 15 November 1997
Cited by 26 | PDF Full-text (19 KB)
Abstract The chemical composition of Hyptis suaveolens was investigated and twenty three compounds were abundant enough to be identified by GC-MS. Full article
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; doi:10.3390/21100169
Received: 2 June 1997 / Accepted: 24 August 1997 / Published: 15 November 1997
Cited by 2 | PDF Full-text (31 KB)
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 [...] 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 Dehydration of Aromatic Heterocyclic Carboxamides to Aromatic Heterocyclic Carbonitriles
Molecules 1997, 2(11), 176-179; doi:10.3390/21100176
Received: 24 October 1997 / Accepted: 7 November 1997 / Published: 15 November 1997
Cited by 2 | PDF Full-text (16 KB)
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 [...] 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

Other

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Open AccessShort Note 3-Dodecyl-5-methyl-2-oxazolidinthione
Molecules 1997, 2(11), M40; doi:10.3390/M40
Received: 28 October 1997 / Published: 18 November 1997
PDF Full-text (82 KB) | Supplementary Files
(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; doi:10.3390/M41
Received: 28 October 1997 / Published: 18 November 1997
PDF Full-text (83 KB) | Supplementary Files
(This article belongs to the Section Medicinal Chemistry)
Open AccessShort Note 4-Dodecyl-6-methyl-2-morpholone
Molecules 1997, 2(11), M42; doi:10.3390/M42
Received: 28 October 1997 / Published: 18 November 1997
PDF Full-text (82 KB) | Supplementary Files
(This article belongs to the Section Molbank Section of Molecules, 1997-2001)

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