Oxidations catalyzed by osmium compounds. Part 1: Efficient alkane oxidation with peroxides catalyzed by an olefin carbonyl osmium(0) complex
作者:Georgiy B. Shul’pin、Aleksandr R. Kudinov、Lidia S. Shul’pina、Elena A. Petrovskaya
DOI:10.1016/j.jorganchem.2005.10.028
日期:2006.2
4-diphenylbut-2-en-1,4-dione)undecacarbonyl triangulotriosmium (1), efficiently catalyzes oxygenation of alkanes (cyclohexane, cyclooctane, n-heptane, isooctane, etc.) with hydrogen peroxide, as well as with tert-butyl hydroperoxide and meta-chloroperoxybenzoic acid in acetonitrile solution. Alkanes are oxidized to corresponding alcohols, ketones (aldehydes) and alkyl hydroperoxides. Thus, heating cyclooctane with the
与π配位烯烃(2,3-η-1,4-diphenylbut-2-en-1,4-dione)十一碳羰基三氟ang(1)形成的羰基os(0)有效催化链烷烃(环己烷,环辛烷,正庚烷,异辛烷等),过氧化氢以及叔丁基氢过氧化物和间氯过氧苯甲酸的乙腈溶液。烷烃被氧化为相应的醇,酮(醛)和烷基氢过氧化物。因此,用1 –H 2 O 2加热环辛烷在70°C下混合后,经过6小时后,产品的营业额高达2400。以环己烷计,所有产物的最大产率均等于20%,以H 2 O 2计,则为30%。直链和支链烷烃的氧化表现出非常低的区域选择性和键选择性参数,这证明该反应是通过羟基自由基攻击烷烃的CH键进行的。当在氩气氛下进行反应时,没有形成氧合产物,因此可以得出结论,氧合是通过烷基与大气氧之间的反应而发生的。总而言之,Os(0)络合物比任何可溶的铁衍生物(在周期系统中是analogue的类似物)都更强大地产生羟基自由基。