Palladium-catalyzedcarbonylative cross coupling reaction of organofluorosilanes with organic halides was achieved in the presence of fluoride ion and an atmospheric pressure of carbon monoxide. Alkenyl- or arylfluorosilanes effectively underwent this reaction with alkenyl or aryl iodides in moderate to good yields. Thus, highly functionalized ketones are readily available without protection of reactive
Alkenylfluorosilanes, phenylfluorosilanes or alkynylsilanes smoothly
dimerize in the presence of a copper(I) salt in a polar solvent
such as N,N-dimethylformamide (DMF) or dimethyl sulfoxide (DMSO)
to give the 1,3-conjugated dienes, biphenyl or 1,3-conjugated diynes,
respectively.
Homo-coupling reactions of an alkenyl- or arylsilane readily occur with a copper(I) salt in an aprotic polar solvent such as N, N-dimethylformamide or dimethyl sulfoxide under an aerobic condition to give the corresponding conjugated dienes or biaryls, respectively. Optimization of a copper salt and a solvent for the homo-coupling reaction is discussed. The formation of the organocopper intermediates
Silafunctional compounds in organic synthesis. 32. Stereoselective halogenolysis of alkenylsilanes: stereochemical dependence on the coordination state of the leaving silyl groups