A novel photoinduced reduction system of low-valent samarium species: reduction of organic halides and chalcogenides, and its application to carbonylation with carbon monoxide
作者:Yukihito Sumino、Nami Harato、Yuri Tomisaka、Akiya Ogawa
DOI:10.1016/j.tet.2003.08.070
日期:2003.12
irradiation is found to enhance the reducing ability of samarium diiodide (SmI2) dramatically. Organic halides (RCl, RBr, RI) and chalcogenides (RSPh, RSePh, RTePh) are smoothly reduced to the corresponding hydrocarbons by using this SmI2–hv system. The photoactivation can be also applied to ytterbium diiodide (YbI2) successfully. When the reduction of alkyl chlorides (RCl) by using the SmI2–hv system is conducted
发现可见光照射可显着增强二碘化sa(SmI 2)的还原能力。通过使用此SmI 2 - hv系统,有机卤化物(RCl,RBr,RI)和硫族化物(RSPh,RSePh,RTePh)可以平滑地还原为相应的烃。光活化也可以成功地应用于二碘化((YbI 2)。当在一氧化碳的压力下使用SmI 2 - hv系统还原烷基氯化物(RCl)时,会获得不对称的酮(RC(O)CH 2 R)作为羰基化产物。机械途径可能涉及酰基sa物种(RC(O)SmI 2),然后进行二聚化,然后用SmI 2还原,得到不对称的酮。