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Displaying article 1-7
p. 716-720
Received: 6 April 2001; in revised form: 13 August 2001 / Accepted: 14 August 2001 / Published: 31 August 2001
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| Download PDF Full-text (68 KB) 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, 1 H NMR, 13 C NMR and mass spectroscopy.
p. 721-727
Received: 4 October 2000; in revised form: 3 August 2001 / Accepted: 14 August 2001 / Published: 31 August 2001
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| Download PDF Full-text (34 KB) 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 instead of Et3 N.
p. 728-735
Received: 29 June 2001; in revised form: 21 August 2000 / Accepted: 22 July 2001 / Published: 31 August 2001
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| Download PDF Full-text (46 KB) Abstract: Eight new furan derivatives have been prepared and characterized. These compounds were obtained by condensation of aminosugar and aminocyclitol intermediates with furan derivatives.
p. 736-769
Received: 15 August 2001 / Accepted: 20 August 2001 / Published: 31 August 2001
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| Download PDF Full-text (302 KB) 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.
p. 770-776
Received: 11 June 2001; in revised form: 24 August 2001 / Accepted: 24 August 2001 / Published: 31 August 2001
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| Download PDF Full-text (38 KB) 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 the substrate structure and reaction conditions. Rationalizations to account for some of the results are suggested.
p. 777-783
Received: 5 December 2000; in revised form: 26 August 2001 / Accepted: 27 August 2001 / Published: 31 August 2001
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| Download PDF Full-text (113 KB) 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, P21 21 21 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.
p. 784-795
Received: 26 February 2001; in revised form: 28 August 2001 / Accepted: 28 August 2001 / Published: 31 August 2001
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| Download PDF Full-text (63 KB) 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.
Displaying article 1-7
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