作者:Rene Baudouy、Françoise Delbecq、Jacques Gore
DOI:10.1016/s0022-328x(00)92330-1
日期:1979.9
Five substituted vinylallenes were metallated at −70°C with butyllithium in THF/ether (50/50). The resulting metal compounds react with alkyl halides under formation of vinylallenes, which are substituted at the terminal C atom of the allene. Functionalized vinylallenic compounds are also obtained by the reactions of the same metal compound with electrophiles (aldehydes, ketones, amides, CO2, etc.)
在-70°C下,用丁基锂在THF /乙醚(50/50)中金属化五种取代的乙烯基亚丙烯。生成的金属化合物与卤代烷反应,生成乙烯基丙二烯,乙烯基丙二烯在丙二烯的末端C原子上被取代。通过相同金属化合物与亲电子试剂(醛,酮,酰胺,CO 2等)的反应,也可以获得官能化的乙烯基烯属化合物。如果金属化迅速(2至6分钟),并且在某些情况下,如果将一当量的HMPT添加到金属化合物的溶液中,这些反应的区域选择性将大大提高。从结果得出有关乙烯基烯丙基锂和乙烯基烯基阴离子的反应性的一些结论。