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

详细信息    查看全文

• 作者：Andreas Stauber ; Titel Jurca ; Christian Marquardt ; Martin Fleischmann ; Michael Seidl ; George R. Whittell ; Ian Manners and Manfred Scheer
• 刊名：European Journal of Inorganic Chemistry
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：2016
• 期：17
• 页码：2684-2687
• 全文大小：551K
• ISSN：1099-0682c

文摘

A simple method to access borylphosphonium iodides [RH₂P–BH₂·NMe₃]I (1a: R = Me; 1b: R = Et; 1c: R = m>nm>Pr) by the addition of iodoalkanes to PH₂–BH₂·NMe₃ was developed. Complexes 1a–c were characterized by multinuclear NMR spectroscopy, and 1a and 1b additionally 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 of 2 generated 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.