Kaźmierczak Joanna, Kuciński Krzysztof, Stachowiak Hanna, Hreczycho Grzegorz
Faculty of Chemistry, Adam Mickiewicz University in Poznań, Umultowska 89b, 61-614, Poznań, Poland.
Chemistry. 2018 Feb 16;24(10):2509-2514. doi: 10.1002/chem.201705898. Epub 2018 Jan 25.
Owing to their versatile application possibilities, silsesquioxanes (SQs) are of considerable interest for creating hybrid inorganic-organic materials. In this report, two novel and independent strategies for the direct attachment of boron functionalities to silsesquioxanes are presented. Encouraged by our previous work concerning the synthesis of borasiloxanes through the catalyst-free dehydrogenative coupling of silanols and boranes, we decided to apply our method to a synthesis of various boron-functionalized silsesquioxanes. During our tests, we also investigated the activity of scandium(III) triflate, which we have previously used as an excellent catalyst for the obtaining of Si-O-Si and Si-O-Ge moieties. As a result, we also discovered a novel approach for the O-borylation of Si-OH groups in silsesquioxanes with allylborane. Both routes are highly chemoselective and efficiently lead to the obtaining of Si-O-B moiety under air atmosphere and at room temperature.
由于倍半硅氧烷（SQs）具有多种应用可能性，因此对于制备无机-有机杂化材料具有相当大的吸引力。在本报告中，提出了两种将硼官能团直接连接到倍半硅氧烷上的新颖且独立的策略。受我们之前通过硅醇和硼烷的无催化剂脱氢偶联合成硼硅氧烷的工作鼓舞，我们决定将我们的方法应用于各种硼官能化倍半硅氧烷的合成。在我们的测试过程中，我们还研究了三氟甲磺酸钪（III）的活性，我们之前曾将其用作获得Si-O-Si和Si-O-Ge部分的优良催化剂。结果，我们还发现了一种用烯丙基硼烷对倍半硅氧烷中的Si-OH基团进行O-硼化的新方法。两条路线都具有高度的化学选择性，并且在空气气氛和室温下有效地导致获得Si-O-B部分。
