Synthetic utility of HCFC-123 (2,2-dichloro-1,1,1-trifluoroethane): the reaction between HCFC-123 and aldehydes using zinc
作者:Masanori Tamura、Akira Sekiya
DOI:10.1016/0022-1139(94)03141-l
日期:1995.3
HCFC-123 (2,2-dichloro-1,1,1-trifluoroethane) reacted with zinc and aldehydes to afford predominantly either 1-substituted 2-chloro-3,3-difluoro-2-propen-1-ols or 1-substituted 2,2-dichloro-3,3,3-trifluoro-1-propanols. The reactions proceeded via 1,1-dichloro-2,2,2-trifluoroethylzinc chloride as an organozinc intermediate.
WATANABE, YOSHIHIKO;YOKOZAWA, TSUTOMU;TAKATA, TOSHIKAZU;ENDO, TAKESHI, J. FLUOR. CHEM., 39,(1988) N 3, 431-434
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.
α-Trifluoromethyl carbon radicals, generated by the tributyltin radical, added intramolecularly to oleginic double bonds to afford the trifluoromethyl-substituted five-memberedring compounds.