Novel Syntheses of Fluorenones via Nitrile-Directed Palladium-Catalyzed C–H and Dual C–H Bond Activation
摘要:
Novel procedures for the [Pd]/[Ag]/TFA system catalyzed cascade reactions of nitrile directed remote C-H and dual C-H bond activation with insertion of nitrile were developed, which afforded variously polysubstituted fluorenones in moderate to good yields with tolerance of a wide variety of substrates.
Novel Syntheses of Fluorenones via Nitrile-Directed Palladium-Catalyzed C–H and Dual C–H Bond Activation
摘要:
Novel procedures for the [Pd]/[Ag]/TFA system catalyzed cascade reactions of nitrile directed remote C-H and dual C-H bond activation with insertion of nitrile were developed, which afforded variously polysubstituted fluorenones in moderate to good yields with tolerance of a wide variety of substrates.
ortho-arylation of phenols by (2-cyanoaryl)azo t-butyl (or phenyl) sulfides in SRN1 conditions, followed by a silica-gel-catalysed lactonisation of the resulting 2-cyano-2′-hydroxybiphenyls, leads to dibenzo[b,d]pyran-6-ones.
The Suzuki–Miyaura cross-coupling reactionbetween 1-3-bromo-4-chloro-5-[1-(R)-fluoropropyl]}phenylpiperazine ((R)-1b) and thermally unstable (o-cyanophenyl)boronic ester 6b in the presence of dichlorobis(triphenylphosphine)palladium and potassium phosphate hydrate in boiling toluene was found to afford 1-3-(2-cyanophenyl)-4-chloro-5-[1-(R)-fluoropropyl]}phenylpiperazine ((R)-5), an intermediate
Biaryl formation in the photochemical reaction of halogenated aromatic nitriles with methoxybenzenes
作者:Khalid A. K. Al-Fakhri、Alec C. Mowatt、Albert C. Pratt
DOI:10.1039/c39800000566
日期:——
Irradiation of tetrachloro- and tetrafluoro-phthalonitriles in the presence of anisole, 1,3-dimethoxy-benzene, or 1,4-dimethoxybenzene, led to formation of biaryls; a similar process occurred with mixtures of 1,4-dimethoxybenzene and 2- or 4-chlorobenzonitrile, but not 3-chlorobenzonitrile.