Synthesis of 4-Aryl-3-(2-chromonyl)-2-pyrazolines by the 1,3-dipolar cycloaddition of 2-styrylchromones with diazomethane
作者:Diana C. G. A. Pinto、Artur M. S. Silva、Lúcia M. P. M. Almeida、José A. S. Cavaleiro、Albert Lévai、Tamás Patonay
DOI:10.1002/jhet.5570350140
日期:1998.1
The first reported 1,3-dipolar cycloaddition of 2-styrylchromones with diazomethane afforded 4-aryl-3-(2-chromonyl)-2-pyrazolines. However, 3-aryl-4-(2-chromonyl)-1-pyrazolines have been also found as minor products of this reaction. These two series of pyrazolines have been fully characterized.
首次报道的2-苯乙烯基色酮与重氮甲烷的1,3-偶极环加成反应得到4-芳基-3-(2-苯甲酰基)-2-吡唑啉。然而,还发现3-芳基-4-(2-苯甲酰基)-1-吡唑啉是该反应的次要产物。这两个系列的吡唑啉已得到充分表征。