In this paper, we highlight the synthesis of a variety of primary phosphine‐boranes (RPH₂⋅BH₃) from the corresponding dichlorophosphines, simply by using Li[BH₄] as reductant and provider of the BH₃ protecting group. The method offers facile access not only to alkyl‐ and arylphosphine‐boranes, but also to aminophosphine‐boranes (R₂NPH₂⋅BH₃) that are convenient building blocks but without the protecting BH₃ moiety thermally labile and notoriously difficult to handle. The borane‐protected primary phosphines can be doubly deprotonated using n‐butyllithium to provide soluble phosphanediides Li₂[RP⋅BH₃] of which the phenyl‐derivative Li₂[PhP⋅BH₃] was structurally characterized in the solid state.

中文翻译：

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轻松获取磷化硼烷积木。

在本文中，我们重点介绍了通过使用 Li[BH ₄ ] 作为还原剂和 BH ₃保护基的提供者，从相应的二氯膦合成各种伯膦硼烷 (RPH ₂ ⋅BH ₃ ) 。该方法不仅可以轻松获得烷基和芳基膦硼烷，还可以轻松获得氨基膦硼烷（R ₂ NPH ₂ ⋅BH ₃），它们是方便的构建单元，但没有保护性的 BH ₃部分，热不稳定且非常难以处理。硼烷保护的伯膦可以使用正丁基锂进行双重去质子化，得到可溶性膦二化合物 Li ₂ [RP⋅BH ₃ ]，其中苯基衍生物 Li ₂ [PhP⋅BH ₃ ] 具有固态结构特征。