Pyranopyrazoles III synthesis of 1<i>H</i>-pyrano[2,3-<i>c</i>]pyrazol-4-ones
作者:Misbahul Ain Khan、Gwynn Pennant Ellis、Mario Celso Pagotto
DOI:10.1002/jhet.5570380129
日期:2001.1
Various derivatives of title ring system were synthesized by Claisen condensation of 4 acetyl-5 -hydroxy-pyrazoles with appropriate esters, followed by acid-catalyzed ring closure.