Palladium catalysed aryl amination reactions in supercritical carbon dioxide
Palladium catalysed C-N bond formation in supercritical carbon dioxide has been accomplished. Carbamic acid formation is avoided in part through the use of an N-silylamine as the coupling partner. Employing a catalyst system of Pd 2dba3 (1 mol%) and 2-dicyclohexylphosphino-2′, 4′,6′-triisopropyl-1,1′-biphenyl (X-Phos) (2 mol%) enabled the catalytic amination of aryl bromides and chlorides with N-silylanilines to be realised in excellent yield. Extension of the methodology to the N-arylation of N-silyldiarylamines, N-silylazoles and N-silylsulfonamides is reported. The Royal Society of Chemistry 2005.
Smith, Catherine J.,Tsang, Melanie W.S.,Holmes, Andrew B.,Danheiser, Rick L.,Tester, Jefferson W.
p. 3767 - 3781
(2007/10/03)
Preparation of carbazolylsilanes
Metallation at the heteroatom of carbazole results in a reactive derivative of carbazole that reacts smoothly with chlorosilanes.Nine carbazolylsilanes have been prepared in high yields by this route.Physical and spectroscopic data and representative chemical properties of the compounds obtained are described.
Appler, Hubertus
p. 217 - 226
(2007/10/02)
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