Halogenation of β-Alkoxyvinyl Polyhaloalkyl Ketones: A Convenient Route for the Synthesis of α-Chloro- or α-Bromo-β-alkoxyvinyl Polyhaloalkyl Ketones
作者:Igor I. Gerus、Liliya M. Kacharova、Sergei I. Vdovenko
DOI:10.1055/s-2001-11435
日期:——
A number of α-chloro- and α-bromo-β-alkoxyvinyl polyhaloalkyl ketones 4 and 5 were synthesized in high yields by halogenation of β-alkoxyvinyl polyhaloalkyl ketones 1 with chlorine or bromine and further dehydrohalogenation of dihalo-intermediates 2 and 3 with pyridine. The Z configuration of ketones 4 and 5 was deduced from X-ray analysis and NMR spectra. Some typical nucleophilic reactions of the title compounds 4 and 5 with amines were carried out to check their reactivity.
Reactions of β-alkoxyvinyl trihalogenomethyl ketones with triethyl phosphite
作者:Karen V. Tarasenko、Igor I. Gerus、Valery P. Kukhar
DOI:10.1016/j.jfluchem.2007.05.010
日期:2007.10
The Perkow reaction of triethylphosphite and β-alkoxyvinyl trihalogenomethyl ketones, which have common acyclic or cyclic structural fragment: –O–CC–C(O)CX2Cl, yielded dienyl phosphates: –O–CC–C[OP(O)(OEt)2]CX2 where X = F or Cl, whereas γ-bromo-β-methoxy-α,β-unsaturated trifluoromethyl ketone CF3C(O)CHC(OMe)CH2Br gave diene CF3C[OP(O)(OEt)2]CH–C(OMe)CH2.