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Title: Synthesis of 5-(<img src='/image/spc_char/delta.gif' border=0><sup>2</sup>-5'-aryl-3'-isoxazolyl)-3,6-dimethylisoxazolo[4,5-<i>b</i>]pyridines
Authors: Rajanarendar, E
Srinivas, M
Ramesh, P
Ramu, K
Keywords: deoxygenation
<img src='/image/spc_char/alpha.gif' border=0> ,<img src='/image/spc_char/beta.gif' border=0>-unsaturated system
isoxa¬zole ring formation
Issue Date: Sep-2005
Publisher: CSIR
Series/Report no.: <b style="">Int</b>.<b style="">Cl</b>.<b style=""><sup>7</sup></b><b style=""> C 07 D</b>
Abstract: Isoxazolopyridine-<i>N</i>-oxides <b style="">2</b> are deoxygenated to pyridines <b style="">3</b> by treatment with PCl<sub>3</sub>. 5-Acetyl-3,6-dimethylisoxazolo[4,5-<i>b</i>]­pyri­dine <b style="">3</b> is condensed with aromatic aldehydes to give <img src='/image/spc_char/alpha.gif' border=0>, <img src='/image/spc_char/beta.gif' border=0>-unsaturated carbonyl moiety at position-5, which then cyclizes to isoxazole ring by reaction with hydroxylamine hydrochloride in sodium acetate-acetic acid to result in title compounds <b style="">7</b>. All the new compounds <b style="">3-7</b> have been characterized by elemental analyses and spectral (IR, <sup>1</sup>H NMR and mass) data.<b></b>
Description: 1927-1930
ISSN: 0975-0983(Online); 0376-4699(Print)
Appears in Collections:IJC-B Vol.44B(09) [September 2005]

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