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p. 690-696
Received: 13 May 2002; in revised form: 9 September 2002 / Accepted: 10 September 2002 / Published: 30 September 2002
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| Download PDF Full-text (366 KB) Abstract: The tripodal ligand N,N-bis-(3-carbomethoxy-5-methylpyrazol-1-yl)methyl aniline (2) has been prepared by the condensation of aniline with two equivalents of N-hydroxymethyl[3-carbomethoxy-5-methyl]pyrazole. The molecule consists of two structurally analogous 3-carbomethoxy-5-methylpyrazol-1-ylmethyl moieties, which adopt a transoidal conformation via a central aniline ring, suggesting that this tripodal ligand is highly flexible and could accommodate many metals by coordination.
p. 697-705
Received: 30 July 2002; in revised form: 12 September 2002 / Accepted: 14 September 2002 / Published: 30 September 2003
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| Download PDF Full-text (323 KB) Abstract: The regioselective protection of the 4-hydroxyl group of 3,4-dihydroxy-benzaldehyde was accomplished with seven different protecting groups (benzyl, p-methoxybenzyl, o-nitrobenzyl, 2,6-dichlorobenzyl, 3,4-dichlorobenzyl, vinyl and propargyl) in yields ranging between 67-75%.
p. 706-711
Received: 28 August 2002; in revised form: 17 September 2002 / Accepted: 19 September 2002 / Published: 30 September 2002
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| Download PDF Full-text (304 KB) Abstract: Preparation of several novel potassium salts of 4-substituted aminoazo-benzenesulfonic acids by the simple and convenient reaction of insoluble 4-sulfo-benzenediazonium chloride with some (hetero)cyclic amines of various ring sizes is reported. The compounds obtained have shown potential antiinflammatory activity in biological testing.
p. 712-716
Received: 2 September 2002; in revised form: 17 September 2002 / Accepted: 19 September 2002 / Published: 30 September 2002
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| Download PDF Full-text (75 KB) Abstract: The chemical composition of the essential oil of Psidium caudatum McVaugh was investigated and thirty-two compounds were identified by HRGC-MS. The main constituents were terpinen-4-ol (47.72%), γ-terpinene (11.58%) and α-terpinene (6.70%).
p. 717-720
Published: 30 September 2002
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| Download PDF Full-text (80 KB) Abstract: n/a
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