In Situ Formation of Allyl Ketones via Hiyama−Nozaki Reactions Followed by a Chromium-Mediated Oppenauer Oxidation
作者:Henri S. Schrekker、Martin W. G. de Bolster、Romano V. A. Orru、Ludger A. Wessjohann
DOI:10.1021/jo001750u
日期:2002.4.1
dependent on the substitution pattern of the reaction partners and the reaction conditions. An appropriate choice of these can lead to preferential formation of ketones instead of the alcohols. In addition to its synthetic usefulness, the oxidation-reduction equilibrium is of the utmost importance for the design of enantioselective Hiyama-Nozaki reactions because it is also a potential racemization pathway
Allylic trialkylstannanes (1) regioselectively react with allylichalides (2) at room temperature under high pressure (10 kbar) to give head-to-tail coupling products (3) in high yields.
Catalyst Behavior in Metal-Catalyzed Carbonyl-Olefin Metathesis
作者:Carly S. Hanson、Mary C. Psaltakis、Janiel J. Cortes、James J. Devery
DOI:10.1021/jacs.9b02613
日期:2019.7.31
carbonyl-olefin metathesiscatalysts. These data are consistent with formation of Lewis acid-carbonyl pairs for both metal systems under stoichiometric conditions. However, they diverge in the presence of higher equivalents of carbonyl, with Fe(III) forming highly ligated complexes, and no observed change for Ga(III). These findings are consistent with the resting state identity of the Fe(III) metathesis catalyst