On treatment with sec-BuLi at −105 °C, 2-bromo-3,3,3-trifluoropropene undergoes rapid lithium–halogen exchange to generate thermally unstable 1-(trifluoromethyl)vinyllithium, which reacts with N-tosylimines to afford N-[2-(trifluoromethyl)allyl]amides in high yield. Propargylation of the amides, followed by the Pauson–Khand reaction, readily provides pyrrolidine ring-fused cyclopentenones with an angular trifluoromethyl group.
在-105 °C下用
仲丁基锂处理时,
2-溴-3,3,3-三氟丙烯会迅速发生
锂-卤素交换,生成热不稳定的 1-(三
氟甲基)
乙烯基锂,它与 N-
对甲苯磺酸亚胺反应生成 N-[2-(三
氟甲基)烯丙基]酰胺,产率很高。酰胺发生副炔化反应,然后进行保森-汉德(Pauson-Khand)反应,很容易得到带角三
氟甲基的
吡咯烷环融合
环戊烯酮。