An efficient and convenient synthesis of 4-polyfluoroalkylated pyrrole-3-carboxylates through 1,3-dipolar cycloaddition reaction of polyfluoro-2-alkynoic acid esters with munchnones
作者:Kazumasa Funabiki、Takashi Ishihara、Hiroki Yamanaka
DOI:10.1016/0022-1139(94)03180-8
日期:1995.3
1,3-Dipolar cycloaddition between polyfluoro-2-alkynoic acid esters and 1,3-oxazolium 5-olates (munchnones) readily proceeds in a regiospecific manner under very mild reaction conditions, followed by simultaneous decarboxylation to afford 4-(polyfluoroalkyl)pyrrole-3-carboxylate derivatives in good yield.
在非常温和的反应条件下,聚氟-2-链烷酸酯和1,3-恶唑鎓5-油酸酯(munchnones)之间的1,3-偶极环加成反应很容易以区域特异性方式进行,然后同时脱羧得到4-(聚氟烷基)吡咯-3-羧酸酯衍生物产率高。