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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Interception of intermediates in phosphine oxidation by mesityl nitrile-N-oxide using frustrated Lewis pairs
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Interception of intermediates in phosphine oxidation by mesityl nitrile-N-oxide using frustrated Lewis pairs

机译:用令人沮丧的路易斯对截取乳乙腈 - N氧化物磷酸氧化中间体

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摘要

Phosphine oxidation by MesCNO is rapid; however, an FLP strategy intercepts the 1,3 addition products including [MesC(R3P) NOB(C6F5)(3)] (R = Ph 1, p-tol 2), [MesC(Mes(2)PH) NOB(C6F5)(3)](3) (MesC(NOB(C6F5)(3))Ph2P)(2)(CH2)(n) (n = 2: 4, 3: 5) and [MesC(Ph3P) NOB(C6F4H)(3)]6. These species are shown to react with tBuOK or [Bu4N]F permitting the oxidation to proceed via a process involving borane dissociation. Similarly, the equilibrium established by 1 with B(C6F4H)(3) and 6 with B(C6F5)(3) provides experimental support for the "Cummins mechanism" for these phosphine oxidations.
机译:麦克斯诺磷酸氧化是迅速的; 然而,FLP策略拦截包括[MESC(R3P)NOB(C6F5)(3)](R = pH 1,P-TOL 2),[MES(2)pH)NOB(C6F5 )(3)](3)(MESC(C6F5)(3))pH 2P)(2)(CH 2)(N)(n = 2:4,3:5)和[MESC(PH3P)NOB(C6F4H )(3)] 6。 这些物种被证明与允许氧化通过涉及硼烷解离的过程进行允许氧化的Δf反应。 类似地,用B(C6F4H)(3)和6具有B(C6F5)(3)建立的含有1的平衡为这些膦氧化的“康明斯机制”提供了实验支持。

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