Aerobic Co-/<i>N</i>-Hydroxysuccinimide-Catalyzed Oxidation of <i>p-</i>Tolylsiloxanes to <i>p-</i>Carboxyphenylsiloxanes: Synthesis of Functionalized Siloxanes as Promising Building Blocks for Siloxane-Based Materials
作者:Irina K. Goncharova、Kseniia P. Silaeva、Ashot V. Arzumanyan、Anton A. Anisimov、Sergey A. Milenin、Roman A. Novikov、Pavel N. Solyev、Yaroslav V. Tkachev、Alexander D. Volodin、Alexander A. Korlyukov、Aziz M. Muzafarov
DOI:10.1021/jacs.8b12600
日期:2019.2.6
that the suggested method is applicable for the oxidation of organic alkylarene derivatives (Ar-CH3, Ar-CH2-R) to the corresponding acids and ketones (Ar-C(O)OH and Ar-C(O)-R), as well as hydride silanes ([Si]-H) to silanols ([Si]-OH). The possibility of synthesizing monomeric (methyl) and polymeric (siloxane-containing PET analogue, Sila-PET) esters based on 1,3-bis( p-carboxyphenyl)disiloxane was
We report a highlyselective synthesis of siloxane building blocks containing SiH2or SiH functionalities. AuCl(PPh3)/PPh3 or AuCl(PPh3)/PnBu3 system catalyzed the reaction of trihydrosilanes with silanols giving SiH2-containing siloxanes exclusively. On the other hand, a highlyselectivereaction of dihydrosilanes with silanols to afford SiH-containing siloxanes was achieved by simply changing the
我们报告了含有SiH 2或SiH官能团的硅氧烷构建基的高度选择性合成。AuCl(PPh 3)/ PPh 3或AuCl(PPh 3)/ P n Bu 3体系催化三氢硅烷与硅烷醇的反应,仅得到含SiH 2的硅氧烷。另一方面,通过简单地将膦配体改变为双齿的黄磷,实现了二氢硅烷与硅烷醇的高度选择性反应以提供含SiH的硅氧烷。的有用性的SiH 2含硅氧烷用三硅氧烷等的合成证明3具有SiH功能的SiOSi(Ph)(H)OSi t BuMe 2和五硅氧烷Ph 2 Si(OSiHPhOSiEt 3)2。
Selective hydrosiloxane synthesis <i>via</i> dehydrogenative coupling of silanols with hydrosilanes catalysed by Fe complexes bearing a tetradentate PNNP ligand
[Fe(H)2(PNNP-R)], which underwent H2 reductive elimination, supporting the hemilabile behavior of PNNP-R. [Fe(PNNP-R)}2(μ-N2)] catalyzed the dehydrogenativecoupling of silanols with silanes to selectively form various hydrosiloxanes, which are important building blocks for the synthesis of a range of siloxane compounds. This system exhibited higher catalytic efficiency than the previously reported precious-metal-catalyzed