1-trifluoromethylvinylsilane as a CF2=C(-)-CH2+ synthon: synthesis of functionalized 1,1-difluoro-1-alkenes via isolable 2,2-difluorovinylsilanes.

doi:10.1021/JO034718J

Paper

1-trifluoromethylvinylsilane as a CF2=C(-)-CH2+ synthon: synthesis of functionalized 1,1-difluoro-1-alkenes via isolable 2,2-difluorovinylsilanes.

Published Sep 4, 2003 · J. Ichikawa, H. Fukui, Yuichiro Ishibashi

The Journal of organic chemistry

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Abstract

Various 1,1-difluoro-1-alkenes such as monosubstituted 1,1-difluoro-1-alkenes, 2-bromo-1,1-difluoro-1-alkenes, and 3,3-difluoroallylic alcohols are synthesized in two simple steps from 1-trifluoromethylvinylsilane: (i) its SN2' reaction with nucleophiles to construct 2,2-difluorovinylsilanes and (ii) the subsequent substitution of electrophiles for the vinylic silyl group. The combination of these two processes allows a one-pot synthesis of the functionalized 1,1-difluoro-1-alkenes starting from 1-trifluoromethylvinylsilane, which functions as a CF2=C(-)-CH2+ synthon.

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1-trifluoromethylvinylsilane can be used as a CF2=C(-)-CH2+ synthon for the synthesis of functionalized 1,1-difluoro-1-alkenes in a one-pot process.

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

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1-trifluoromethylvinylsilane as a CF2=C(-)-CH2+ synthon: synthesis of functionalized 1,1-difluoro-1-alkenes via isolable 2,2-difluorovinylsilanes.

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