A Convenient Route to Monoalkyl-Substituted Phosphanylboranes (HRP–BH2–NMe3): Prospective Precursors to Poly[(alkylphosphino)­boranes]†

A Convenient Route to Monoalkyl-Substituted Phosphanylboranes (HRP–BH2–NMe3): Prospective Precursors to Poly[(alkylphosphino)­boranes]†
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制备单烷基取代的膦基硼烷 (HRPâBH2âNMe3) 的便捷途径:聚[(烷基膦基)硼烷]â 的潜在前体 

DOI:
10.1002/ejic.201600226
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发表时间:
2016
影响因子:
2.3
通讯作者:
M. Scheer
M. Scheer
中科院分区:
化学3区
文献类型:
--
作者:
A. Stauber;T. Jurca;C. Marquardt;M. Fleischmann;M. Seidl;G. R. Whittell;I. Manners;M. Scheer

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开发了一种通过向 PH2–BH2·NMe3 中加成碘代烷烃来制备硼基碘化膦 [RH2P–BH2·NMe3]I (1a: R = Me;1b: R = Et;1c: R =nPr) 的简单方法。配合物 1a-c 通过多核 NMR 光谱进行了表征,1a 和 1b 还通过单晶 X 射线衍射进行了表征。可以从 [MePH2–BH2·NMe3]I (1a) 合成路易斯碱稳定的有机取代膦基硼烷 MePH–BH2·NMe3(2)。通过 ESI-MS 鉴定,2 的热分解生成了由至少 40 个重复单元组成的可溶性低分子量聚(烷基膦硼烷)。这些结果对于未来制备各种路易斯碱稳定的膦基硼烷来说是有希望的,它们作为聚[(烷基膦基)硼烷]的前体很有意义,并且很难通过传统的金属催化方法获得。
A simple method to access borylphosphonium iodides [RH2P–BH2·NMe3]I (1a: R = Me;1b: R = Et;1c: R =nPr) by the addition of iodoalkanes to PH2–BH2·NMe3was developed. Complexes1a–cwere characterized by multinuclear NMR spectroscopy, and1aand1badditionally by single‐crystal X‐ray diffraction. It was possible to synthesize the Lewis‐base‐stabilized organosubstituted phosphanylborane MePH–BH2·NMe3(2) from [MePH2–BH2·NMe3]I (1a). Thermolysis of2generated a soluble, low‐molecular‐mass poly(alkylphosphinoborane) consisting of at least 40 repeat units, as identified by ESI‐MS. These results are promising for the future preparation of a wide range of Lewis‐base‐stabilized phosphanylboranes, which are of interest as precursors to poly[(alkylphosphino)boranes] and are otherwise difficult to access by conventional metal‐catalyzed methods.
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