Nucleophilic introduction of fluorinated alkyl groups into aldehydes and ketones using the corresponding alkyl halide with samarium(II) iodide
作者:Masato Yoshida、Daiki Suzuki、Masahiko Iyoda
DOI:10.1039/a606048j
日期:——
Fluorinated alkyl groups such as PhCF2,
C6F13, CF3CCl2 and
CF2CO2Et are nucleophilically introduced into an
aldehyde or ketone using fluorinated alkyl halides with SmI2;
the reaction proceeds effectively at room temperature to give the
corresponding alcohol. Furthermore, the synthesis of
PhCF2SiMe3,
C6F13SiMe3 and
C6F13SiMe2Pri is achieved by
reaction of the halide with SmI2 in the presence of the silyl
chloride; the resultant fluoroalkylated silyl compounds are used as
reagents for nucleophilic fluoroalkylation.
2-Chloro-3,3,3-trifluoropropene derivatives are also prepared
selectively by the reaction of CF3CCl3 with an
excess of SmI2 in the presence of an aldehyde and
PriOH.
氟代烷基如PhCF2、C6F13、CF3CCl2和CF2CO2Et可以通过氟代烷基卤化物与SmI2在室温下有效反应,亲核引入醛或酮中,形成相应的醇。此外,通过卤化物与SmI2在硅氯化物存在下的反应,实现了PhCF2SiMe3、C6F13SiMe3和C6F13SiMe2Pri的合成;由此得到的氟代烷基硅化合物作为亲核氟代烷基化的试剂。2-氯-3,3,3-三氟丙烯衍生物也通过CF3CCl3与过量的SmI2在醛和PriOH存在下的反应选择性制备。