Perfluoroalkylation of benzyl bromides using perfluoro-2- methylphent-2-ene in potassium fluoride-dimethylformamide
作者:Isao Ikeda、Masanori Tsuji、Mitsuo Okahara
DOI:10.1016/s0022-1139(00)81024-6
日期:1987.7
A marked solvent effect was found in the reaction of perfluoro-2-methyl-2-pentene and benzyl bromides in the presence of fluoride anion to form α-(perfluoro-1,1- dimethylbutyl)-tolunitrile derivatives. Thus, potassium fluoride worked effectively as a fluoride ion source in N,N- dimethylformamide probably to afford nucleophilic perfluoro-1,1-dimethylbuthyl-potassium. To the contrary,in diglyme, potassium
在全氟-2-甲基-2-戊烯和苄基溴在氟化物阴离子的存在下反应生成α-(全氟-1,1-二甲基丁基)-甲苯磺酸衍生物时,发现了明显的溶剂作用。因此,氟化钾在N,N-二甲基甲酰胺中作为氟离子源有效地起作用,可能提供亲核的全氟-1,1-二甲基丁基钾。相反,在二甘醇二甲醚中,氟化钾仅产生微量的所需产物。将氰基,硝基和未取代的苄基溴和α,α'-二溴二甲苯以几乎定量的产率转化为相应的产物。