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M575
Received: 23 July 2008; in revised form: 2 September 2008 / Accepted: 4 September 2008 / Published: 4 September 2008
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M576
Received: 23 July 2008 / Accepted: 27 August 2008 / Published: 4 September 2008
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M577
Received: 28 July 2008 / Accepted: 1 September 2008 / Published: 4 September 2008
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| Download PDF Full-text (49 KB) | Abstract: In this study, a fast and good yield one-pot microwave-assisted synthesis (45 seconds) of 1H-phenanthro[9,10-d][1,2,3]triazole by a 1,3-dipolar cycloaddition reaction of sodium azide and 9-bromophenanthrene in the presence of potassium tert-butoxide in DMSO as solvent is reported.
M578
Received: 9 September 2008 / Accepted: 3 November 2008 / Published: 7 November 2008
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M579
Received: 18 September 2008 / Accepted: 3 November 2008 / Published: 7 November 2008
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| Download PDF Full-text (306 KB) | Abstract: We recently reported the asymmetric synthesis of the two title compounds without the configurational assignments of the newly formed chiral spirocarbons. We now wish to report that both compounds have a (R)-configuration at the spirocarbon based on 1D and 2D nuclear Overhauser enhancement (nOe) experiments.
M580
Received: 11 September 2008 / Accepted: 5 November 2008 / Published: 23 November 2008
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M581
Received: 30 September 2008 / Accepted: 6 November 2008 / Published: 23 November 2008
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| Download PDF Full-text (189 KB) | Abstract: Stem bark of Phoebe lanceolata was extracted with ethanol and fractionated with ethyl acetate yielded soluble and insoluble fractions. Ethyl acetate insoluble fraction was subjected to column chromatography afforded two oxalyl-fused didehydroaporphine alkaloids, N-6/C-7 oxalyl-fused 2,9-dihydroxy-1,10-dimethoxy 6a,7-didehydroaporphine and N-6/C-7 oxalyl-fused 1,2,9,10-tetramethoxy 6a,7-didehydroaporphine along with well known β-sitosterol and β-sitosterol glucoside. The structures of isolated compounds were elucidated by chemical and spectral analysis.
M582
Received: 16 November 2008 / Accepted: 21 November 2008 / Published: 23 November 2008
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| Download PDF Full-text (219 KB) | Abstract: A new Schiff base 4-[(pyridin-3-ylmethylene)amino]phenyldodecanoate was synthesized via Steglich esterification. IR, 1H NMR, 13C NMR and MS spectroscopic data are presented.
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