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Molecules, Volume 7, Issue 6 (June 2002) – 5 articles , Pages 469-506

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Open AccessArticle
Carotamine, a Unique Aromatic Amide from Daucus Carota L. Var Biossieri (Apiaceae)
Molecules 2002, 7(6), 501-506; https://doi.org/10.3390/70600501 - 30 Jun 2002
Cited by 1 | Viewed by 7099
Abstract
The unique aromatic peptide 4-(p-aminobenzoylamino)-2-aminobenzoic acid, carotamine, together with 2,4-diaminobenzoic acid, isolated for the first time from a plant source, were identified from the aqueous alcoholic extract of the aerial parts of Daucus carota L. var. boissieri (Apiaceae). The structures were determined through [...] Read more.
The unique aromatic peptide 4-(p-aminobenzoylamino)-2-aminobenzoic acid, carotamine, together with 2,4-diaminobenzoic acid, isolated for the first time from a plant source, were identified from the aqueous alcoholic extract of the aerial parts of Daucus carota L. var. boissieri (Apiaceae). The structures were determined through conventional methods of analysis and confirmed by LC-ESI/MS and NMR spectral analysis. Full article
Open AccessArticle
A Novel Synthesis of 1,2,4-Triazolopteridines
Molecules 2002, 7(6), 494-500; https://doi.org/10.3390/70600494 - 30 Jun 2002
Cited by 16 | Viewed by 5055
Abstract
Reaction of 1,2-dihydro-2-thioxopteridin-4(3H)-one, 6,7-dimethyl-1,2-dihydro-2-thioxopteridin-4(3H)-one and 6,7-diphenyl-1,2-dihydro-2-thioxopteridin-4(3H)-one with hydrazonoyl halides affords the title compounds in good yields. Full article
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Open AccessArticle
An Efficient Preparation of 1,2-Diamino-1-phenylheptane
Molecules 2002, 7(6), 487-493; https://doi.org/10.3390/70600487 - 30 Jun 2002
Cited by 8 | Viewed by 6027
Abstract
A convenient four-step method for the preparation of the lipophilic vicinal diamine 1,2-diamino-1-phenylheptane is described. Condensation involving octan-2-one, benzaldehyde and ammonia is reported. Regioselective Schmidt rearrangement of 2,6-diphenyl-3-pentyl-piperidin-4-one (1) to 2,7-diphenyl-3-pentyl hexahydrodiazapin-5-one (3) is presented. Hydrolysis of 2,7-diphenyl-3-pentyl hexahydrodiazapin-5-one to 1,2-diamino-1-phenylheptane (4) is [...] Read more.
A convenient four-step method for the preparation of the lipophilic vicinal diamine 1,2-diamino-1-phenylheptane is described. Condensation involving octan-2-one, benzaldehyde and ammonia is reported. Regioselective Schmidt rearrangement of 2,6-diphenyl-3-pentyl-piperidin-4-one (1) to 2,7-diphenyl-3-pentyl hexahydrodiazapin-5-one (3) is presented. Hydrolysis of 2,7-diphenyl-3-pentyl hexahydrodiazapin-5-one to 1,2-diamino-1-phenylheptane (4) is also reported for the first time. Full article
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Open AccessArticle
Synthetic Studies on Diels-Alder Adducts: Intramolecular Interactions Between Two Functions
Molecules 2002, 7(6), 475-486; https://doi.org/10.3390/70600475 - 30 Jun 2002
Cited by 1 | Viewed by 7384
Abstract
In this paper we describe the synthesis of a γ,δ-unsaturated aldehyde from a bicyclic Diels-Alder adduct, to be used in future electrocyclic reaction studies. A number of reactions produced undesired materials resulting from the interaction between functions, forcing the use of partial protection [...] Read more.
In this paper we describe the synthesis of a γ,δ-unsaturated aldehyde from a bicyclic Diels-Alder adduct, to be used in future electrocyclic reaction studies. A number of reactions produced undesired materials resulting from the interaction between functions, forcing the use of partial protection to accomplish a synthesis that would be otherwise straightforward. Suggestions to account for the results are given. Full article
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Open AccessArticle
Toward a Library Synthesis of the Natural Dipeptide Antibiotic TAN 1057 A,B
Molecules 2002, 7(6), 469-474; https://doi.org/10.3390/70600469 - 30 Jun 2002
Cited by 7 | Viewed by 5537
Abstract
The natural dipeptide antibiotic TAN 1057 A,B represents a promising new antibiotic entity. In this communication we report a novel approach for the synthesis of TAN 1057 A,B analogs bearing variations in the β-arginine side chain. This approach involves a combination of liquid [...] Read more.
The natural dipeptide antibiotic TAN 1057 A,B represents a promising new antibiotic entity. In this communication we report a novel approach for the synthesis of TAN 1057 A,B analogs bearing variations in the β-arginine side chain. This approach involves a combination of liquid and solid phase methods and allows for a library synthesis of analogs of the natural product. Full article
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