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Ring Closure of 4‐Azido‐3‐formyl‐(or Acetyl‐)2‐pyridones to Isoxazolo[4,3‐c]pyridones
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Titel: |
Ring Closure of 4‐Azido‐3‐formyl‐(or Acetyl‐)2‐pyridones to Isoxazolo[4,3‐c]pyridones |
In: | Liebigs Annalen, 1996, 1996, 3, S. 393-395 |
veröffentlicht: |
Wiley
|
Umfang: | 393-395 |
ISSN: |
0947-3440 |
DOI: | 10.1002/jlac.199619960314 |
Zusammenfassung: | <jats:title>Abstract</jats:title><jats:p>Azidation of the chlor aldehyde <jats:bold>2</jats:bold>, which was obtained from the 4‐hydroxy‐2‐pyridone <jats:bold>1</jats:bold>, afforded the ring‐closed isoxazolopyridone <jats:bold>3</jats:bold>. Thermolysis of the 3‐acetyl‐4‐azido‐2‐pyridone <jats:bold>8</jats:bold>, which was obtained from the corresponding 4‐tosyloxy derivative <jats:bold>7</jats:bold>, afforded isoxazolopyridine <jats:bold>9</jats:bold>. Amination of the chloro aldehyde <jats:bold>2</jats:bold> yielded the pyrido[4,3‐<jats:italic>b</jats:italic>]quinoline <jats:bold>11</jats:bold> instead of the 4‐chloroazomethine <jats:bold>10</jats:bold>.</jats:p> |
Format: | E-Article |
Quelle: | Wiley (CrossRef) |
Sprache: | Englisch |