The first inter- and intramolecular McMurry reactions of aroyltrimethylsilanes to substituted 1,2-bis(trimethylsilyl)ethene derivatives 2a-c and 7 are described. A low-valent titanium reagent prepared by the reduction of TiCl3 with Na on inorganic supports (Al2O3, NaCl, TiO2) turned out to be best suited. Depending on the reaction conditions and on the particular substitution patterns of the substrates
描述了芳基三甲基
硅烷与取代的1,2-双(三甲基甲
硅烷基)
乙烯衍
生物2a-c和7的第一分子间和分子内McMurry反应。事实证明,通过在无机载体(Al 2 O 3,NaCl,TiO 2)上用Na还原TiCl 3制备的低价
钛试剂是最合适的。根据反应条件和底物的特定取代方式,导致形成C,O-二甲
硅烷基烯醇醚的中间体1,2-二甲
硅烷基化的1,2
-二醇钛酸酯的Brook重排可能与McMurry竞争脱氧途径。