Controlled Switching of Multicomponent Heterocyclizations of 5-Amino-<i>N</i>-arylpyrazole-4-carboxamides, 1,3-Cyclohexanediones, and Aldehydes
作者:Valentin A. Chebanov、Vyacheslav E. Saraev、Svetlana V. Shishkina、Oleg V. Shishkin、Vladimir I. Musatov、Sergey M. Desenko
DOI:10.1002/ejoc.201200669
日期:2012.10
Multicomponentheterocyclization of 5-amino-N-arylpyrazole-4-carboxamides, 1,3-cyclohexanediones, and aromatic aldehydes was studied, and reaction conditions allowing selective switching between two directions were found. When the reaction was carried out underthermalheating or ultrasonication at room temperature, formation of linear pyrazoloquinoline-3-carboxamides was observed. Isomeric angular