The present invention provides a method of removing undesired isomers, including substituted cyclopentadiene regioisomers, from the desired fulvene in a crude fulvene composition by selectively reacting the undesired isomers with pyrrolidine and 4-(N,N-dimethylamino)benzaldehyde. This reaction converts the undesired substituted cyclopentadienes into fulvene-type compounds that is readily separated from the desired fulvene.
本发明提供了一种从粗制富烯中选择性地去除不需要的异构体,包括取代的
环戊二烯位置异构体的方法,该方法通过与
吡咯烷和4-(N,N-
二甲氨基)
苯甲醛选择性地反应不需要的异构体,将其转化为易于与所需的富烯分离的富烯型化合物。