Difluorocarbene chemistry: synthesis of gem-difluorocyclopropenylalkynes and 3,3,3′,3′-tetrafluorobicyclopropyl-1,1′-dienes
作者:Zhan-Ling Cheng、Qing-Yun Chen
DOI:10.1016/j.jfluchem.2004.10.003
日期:2005.1
by the Sonogashira reaction of 3,3-difluoro-1-iodocyclopropenes with terminal alkynes. Onto these new alkynes addition of difluorocarbene, generated from the decomposition of FSO2CF2COOTMS in diglme in the presence of 10 mol% anhydrous NaF at 120 °C, gives 3,3,3′,3′-tetrafluorobicyclopropyl-1,1′-dienes. Acid hydrolysis of gem-difluorocyclopropenylalkynes in refluxing CH3OH affords the corresponding
通过3,3-二氟-1-碘代环丙烯与末端炔的Sonogashira反应,可以容易地以高收率获得一系列宝石-二氟环丙烯基炔。在这些新的炔烃中,由FSO 2 CF 2 COOTMS在10 mol%无水NaF在120°C的条件下在乙二胺中分解生成的二氟卡宾,得到3,3,3',3'-四氟双环丙基-1,1 '-二烯。宝石-二氟环丙烯基炔烃在回流的CH 3 OH中的酸水解得到相应的甲氧基羰基炔烃。