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Molecules, Volume 6, Issue 9 (September 2001), Pages 716-795

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Research

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Open AccessArticle Synthesis of Camalexin
Molecules 2001, 6(9), 716-720; doi:10.3390/60900716
Received: 6 April 2001 / Revised: 13 August 2001 / Accepted: 14 August 2001 / Published: 31 August 2001
Cited by 6 | PDF Full-text (68 KB) | HTML Full-text | XML Full-text
Abstract
In this paper we describe a new method for the synthesis of camalexin (1) based on the reaction of 1-(tert-butoxycarbonyl)indole-3-carboxaldehyde with methyl Lcysteinate hydrochloride, followed by oxidation and decarboxylation. Compounds 1, and intermediates 5-7 were identified by elemental analysis, 1H NMR, 13
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In this paper we describe a new method for the synthesis of camalexin (1) based on the reaction of 1-(tert-butoxycarbonyl)indole-3-carboxaldehyde with methyl Lcysteinate hydrochloride, followed by oxidation and decarboxylation. Compounds 1, and intermediates 5-7 were identified by elemental analysis, 1H NMR, 13C NMR and mass spectroscopy. Full article
Open AccessArticle Chemistry of Pyrones, Part 5: New Crown Ether and Podand Derivatives of 3,5-Bis(bromomethyl)-2,6-diphenyl-4H-pyran-4-one
Molecules 2001, 6(9), 721-727; doi:10.3390/60900721
Received: 4 October 2000 / Revised: 3 August 2001 / Accepted: 14 August 2001 / Published: 31 August 2001
Cited by 5 | PDF Full-text (34 KB) | HTML Full-text | XML Full-text
Abstract
New podand and crown ether derivatives of 3,5-disubstituted 4H-pyran-4-one (8-11) were prepared by the nucleophilic substitution reaction of 3,5-bis(bromomethyl)-2,6-diphenyl-4H-pyran-4-one with o-nitrophenol, 8-hydroxyquinoline, 2-hydroxymethyl pyridine and triethyleneglycol, respectively. The yield of 3,5-bis[(2-formylphenoxy) methyl]-2,6-diphenyl-4H-pyran-4-one has been improved by modification of our previous method using NaOH
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New podand and crown ether derivatives of 3,5-disubstituted 4H-pyran-4-one (8-11) were prepared by the nucleophilic substitution reaction of 3,5-bis(bromomethyl)-2,6-diphenyl-4H-pyran-4-one with o-nitrophenol, 8-hydroxyquinoline, 2-hydroxymethyl pyridine and triethyleneglycol, respectively. The yield of 3,5-bis[(2-formylphenoxy) methyl]-2,6-diphenyl-4H-pyran-4-one has been improved by modification of our previous method using NaOH instead of Et3N. Full article
Open AccessArticle Synthesis of Furan Derivatives Condensed with Carbohydrates
Molecules 2001, 6(9), 728-735; doi:10.3390/60900728
Received: 29 June 2001 / Revised: 21 August 2000 / Accepted: 22 July 2001 / Published: 31 August 2001
Cited by 1 | PDF Full-text (46 KB) | HTML Full-text | XML Full-text
Abstract Eight new furan derivatives have been prepared and characterized. These compounds were obtained by condensation of aminosugar and aminocyclitol intermediates with furan derivatives. Full article
Open AccessArticle Niobium Pentachloride Catalysed Ring Opening of Epoxides
Molecules 2001, 6(9), 770-776; doi:10.3390/60900770
Received: 11 June 2001 / Revised: 24 August 2001 / Accepted: 24 August 2001 / Published: 31 August 2001
Cited by 18 | PDF Full-text (38 KB) | HTML Full-text | XML Full-text
Abstract
Epoxide ring opening is a frequently required transformation in Organic Synthesis. In this paper we describe the application of NbCl5 for this purpose using three different substrates. Chlorohydrins, 1,2-diols, products containing solvent residues as well as rearrangement products are obtained, depending on both
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Epoxide ring opening is a frequently required transformation in Organic Synthesis. In this paper we describe the application of NbCl5 for this purpose using three different substrates. Chlorohydrins, 1,2-diols, products containing solvent residues as well as rearrangement products are obtained, depending on both the substrate structure and reaction conditions. Rationalizations to account for some of the results are suggested. Full article
Open AccessArticle Crystal and molecular structure of cis-Dichlorobis(triphenylphosphite) Platinum(II)
Molecules 2001, 6(9), 777-783; doi:10.3390/60900777
Received: 5 December 2000 / Revised: 26 August 2001 / Accepted: 27 August 2001 / Published: 31 August 2001
Cited by 3 | PDF Full-text (113 KB) | HTML Full-text | XML Full-text
Abstract
The single crystal structure of cis-dichlorobis(triphenyphosphite) platinum(II), [PtCl2(P(OPh)3)2] has been determined. This complex crystallises in the orthorhombic space group, P212121 with cell constant, a=10.4135(13), b=14.0635(16), c=23.505(3) Ǻ and v=3448.3(7) Ǻ 3.
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The single crystal structure of cis-dichlorobis(triphenyphosphite) platinum(II), [PtCl2(P(OPh)3)2] has been determined. This complex crystallises in the orthorhombic space group, P212121 with cell constant, a=10.4135(13), b=14.0635(16), c=23.505(3) Ǻ and v=3448.3(7) Ǻ 3. The Pt-Cl1 and Pt-Cl2 distances are 2.3390(10) Ǻ and 2.3256 Ǻ, which are longer than Pt-P1 and Pt-P2 with 2.1985(12) Ǻ and 2.1998(10) Ǻ respectively. These data together with bond angles suggest a distorted square planar geometry for this complex with two chlorine ligands in a cis configuration. Full article
Open AccessArticle Biologically Active 1-Arylpiperazines. Synthesis of New N-(4-Aryl-1-piperazinyl)alkyl Derivatives of Quinazolidin-4(3H)-one, 2,3-Dihydrophthalazine-1,4-dione and 1,2-Dihydropyridazine-3,6-dione as Potential Serotonin Receptor Ligands
Molecules 2001, 6(9), 784-795; doi:10.3390/60900784
Received: 26 February 2001 / Revised: 28 August 2001 / Accepted: 28 August 2001 / Published: 31 August 2001
Cited by 8 | PDF Full-text (63 KB) | HTML Full-text | XML Full-text
Abstract The synthesis of a series of new n-propyl and n-butyl chain containing 1-arylpiperazine derivatives of quinazolidin-4(3H)-one (7) 2-phenyl-2,3-dihydrophthalazine-1,4-dione (8) and 1-phenyl-1,2-dihydropyridazine-3,6-dione (9) as potential serotonin receptor ligands is described. Full article

Review

Jump to: Research

Open AccessReview Tyrian Purple: 6,6’-Dibromoindigo and Related Compounds
Molecules 2001, 6(9), 736-769; doi:10.3390/60900736
Received: 15 August 2001 / Accepted: 20 August 2001 / Published: 31 August 2001
Cited by 84 | PDF Full-text (302 KB) | HTML Full-text | XML Full-text
Abstract The genesis of the purple dye from shellfish, its composition, origin, intermediates, analysis and synthesis of the components, 6,6’-dibromoindigo, 6-bromoindigo and 6,6’-dibromoindirubin are reviewed. Full article

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