Metal-catalyzed coupling process comprising reacting a compound of general formula 1 with a compound A-X, to obtain a compound of general formula 2, which may further be converted to a compound of general formula 3
Site-Selective sp<sup>2</sup> and Benzylic sp<sup>3</sup> Palladium-Catalyzed Direct Arylation
作者:Louis-Charles Campeau、Derek J. Schipper、Keith Fagnou
DOI:10.1021/ja710451s
日期:2008.3.1
Palladium-catalyzed siteselective arylation reactions of both sp2 and benzylic sp3 sites on azine and diazine N-oxide substrates are described that occur in good to excellent yield and with complete selectivity for reaction at the desired position. These studies have uncovered the need to properly control the metal to ligand ratio in sp2 arylation and necessitated a complete reinvestigation of all reaction parameters
Direct arylation of azine N-oxides with aryl triflates
作者:Derek J. Schipper、Mohamed El-Salfiti、Christopher J. Whipp、Keith Fagnou
DOI:10.1016/j.tet.2009.03.077
日期:2009.6
Palladium catalyzed direct arylation of azine N-oxides using aryltriflates to afford the corresponding 2-aryl azine N-oxides is described. The reaction is carried out with a range of both N-oxides and aryltriflates. The arylation can be carried out in sequence to yield differentially diarylated products. The regioselectivity and scope of 3-substituted azine N-oxides are investigated. The method is
Campeau, Louis-Charles; Stuart, David R.; Leclerc, Jean-Philippe, Journal of the American Chemical Society, 2009, vol. 131, p. 3291 - 3306
作者:Campeau, Louis-Charles、Stuart, David R.、Leclerc, Jean-Philippe、Bertrand-Laperle, Megan、Villemure, Elisia、et al.
DOI:——
日期:——
Catalyst and base controlled site-selective sp2 and sp3 direct arylation of azine N-oxides
作者:Derek J. Schipper、Louis-Charles Campeau、Keith Fagnou
DOI:10.1016/j.tet.2008.12.004
日期:2009.4
Site-selective direct arylation of both sp(2) and sp(3) sites on azine N-oxide substrates is described. The arylation reactions are carried out in either a divergent manner or a sequential manner The sp arylation reaction is applied to the synthesis of the natural products, papaverine and crykonisine, and. rationale for low reactivity of electron-deficient aryl halides is provided. Mechanistic investigations point toward the intimate involvement of the base in the mechanism of these reactions. (C) 2008 Published by Elsevier Ltd.