Palladium-catalyzed alkylation of allylic nitrates derived from ceric ammonium nitrate promoted oxidative addition of trimethylsilyloxy-cyclopropanes to 1,3-butadiene
作者:Anna Belli Paolobelli、Fabio Gioacchinia、Renzo Ruzziconi
DOI:10.1016/s0040-4039(00)73745-2
日期:1993.9
Silyloxycyclopropanes are easily oxidized by cericammoniumnitrate to generate β-carbonylalkyl radicals which are able to add to 1,3-butadiene to give a mixture of 4-(γ-carbonylalkyl)-substituted 3-nitroxy-1-butenes and 4-(γ-carbonylalkyl) substituted (E)-1-nitroxy-2-butenes (1,2- and 1,4-adducts) in ca. 1:1 molar ratio. The crude mixture, subjected to palladium-catalyzed alkylation by a variety of
Tertiary cyclopropanol systems react with a catalytic amount of vanadyl acetylacetonate under an oxygen atmosphere to afford β-hydroxyketones and β-diketones.
Tertiary cyclopropanol compounds react with a catalytic amount of vanadyl acetylacetonate in the presence of oxygen affording beta-hydroxyketones and beta-diketones. For 3-substituted-bicyclo[4. 1.0]alkanols, peroxides are obtained, as are the beta-hydroxyketones. Conversely, 2-ethoxycarbonylcyclopropyl silyl ethers produce ethyl gamma-oxocarboxylate derivatives given the same reaction conditions. (c) 2005 Elsevier Ltd. All rights reserved.
Ryu, Ilhyong; Matsumoto, Koichi; Kameyama, Yasuhiro, Journal of the American Chemical Society, 1993, vol. 115, # 26, p. 12330 - 12339