作者:Kazuaki Takami、Satoshi Mikami、Hideki Yorimitsu、Hiroshi Shinokubo、Koichiro Oshima
DOI:10.1016/s0040-4020(03)01016-0
日期:2003.8
A gallium hydride reagent, HGaCl2, was found to act as a radical mediator. Treatment of alkyl halides with the gallium hydride reagent, generated from gallium trichloride and sodium bis(2-methoxyethoxy)aluminum hydride, provided the corresponding reduced products in excellent yields. Radical cyclization of halo acetals was also successful with not only the stoichiometric gallium reagent but also a
发现氢化镓试剂HGaCl 2充当自由基介体。用由三氯化镓和双(2-甲氧基乙氧基)铝氢化钠生成的氢化镓试剂处理卤代烷,可提供相应的还原产物,收率很高。不仅用化学计量的镓试剂而且用催化量的三氯化镓结合化学计量的氢化铝作为氢化物源,卤代乙缩醛的自由基环化也是成功的。由三氯化铟和二异丁基氢化铝制备的氢化铟试剂HInCl 2也用作自由基介体。在Et 3 B作为自由基引发剂的情况下,HInCl 2可以还原芳基碘化物和溴化物。图选项