低价钛诱导的芳香邻二酮及α－羟基酮的还原偶联反应

Low-Valent Titanium Induced Reductive Coupling Reactions of Aromatic 1 ,2-Diketones and a-Hydroxy Ketones

低价钛诱导的芳香邻二酮及α－羟基酮的还原偶联反应侯自杰，刘利军，张建华，李裕林（兰州大学有机化学研究所，兰州，７３００００）关键词低价钛，芳香邻二酮，芳香α－羟基酮，偶联羰基化合物在低价钛诱导下的还原偶联反应已有深入研究并在有机合成中得到广泛应用［１...

Treatment of aromatic 1 ,2-diketones or aromatic a-hydroxy ketones with an activated low-valent titanium reagent, prepared by reduction of TiCl_3·1/3AlCl_3 with a Zn-Cu reagent, gave an intermolecular coupling reaction leading to the (Z)-1,2.3.4-tetraaryl-2-butenes. A possible coupling reaction process was proposed for the aromatic a-hydroxy ketones.