This paper reports advances in redox transmetalation/protolysis (RTP) utilizing the readily available Ph₃Bi for the synthesis of a series of barium metal-organic species. On the basis of easily available starting materials, an easy one-pot procedure, and workup, we have obtained BaL₂ compounds (L = bis(trimethylsilyl)amide, phenyl(trimethylsilyl)amide, pentamethylcyclopentadienide, fluorenide, 2,6-di-isopropylphenolate, and 3,5-diphenylpyrazolate) quantitatively by sonication of an excess of barium metal with triphenylbismuth and HL in perdeuterotetrahydrofuran, as established by NMR measurements. Rates of conversion are affected by both pK_a and bulk of HL. Competition occurs from direct reaction of Ba with HL, thereby enhancing the overall conversion, the effect being pronounced for the less bulky and more acidic ligands. Overall, the method significantly adds to the synthetic armory for barium metal-organic/organometallic compounds.

中文翻译：

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现代的经典合成路线：制备钡金属有机物种的基于Ph _3的双基氧化还原跨金属化反应（RTP）

本文报道了利用现成的Ph ₃ Bi合成一系列钡金属-有机物种在氧化还原金属转移/质子水解（RTP）方面的进展。根据容易获得的原料，简单的一锅操作方法和后处理方法，我们获得了BaL ₂化合物（L =双（三甲基甲硅烷基）酰胺，苯基（三甲基甲硅烷基）酰胺，五甲基环戊二烯，氟化物，2,6-二-如NMR测定所确定的，通过在过四氢呋喃中用三苯基铋和HL超声处理过量的钡金属，定量地定量得到异丙基苯酚和3,5-二苯基吡唑酸酯）。转化率受p K _a的影响和大量的HL。Ba与HL的直接反应产生了竞争，从而提高了总转化率，对于体积较小，酸性较大的配体而言，效果尤为明显。总体而言，该方法显着增加了钡金属-有机/有机金属化合物的合成军械库。