Preparation of 2,5-Disilylated Thiophene Derivatives and Their Conversion to 2,5-Dihalo Derivatives
摘要:
2,5-Disilylated thiophenes were prepared and readily oxidized with m-chloroperbenzoic acid (m-CPBA) to give the corresponding 1,1-dioxides. The thiophene dioxide was converted to 2,5-dihalogenothiophene dioxides with halogenating agents.
The synthesis of a series of di- tri- and tetraboronic acids based on respective phenyl- and thienylsilane cores is described. The optimal protocols involved lithiation of respective arylsilane precursors using either deprotonative lithiation or halogen/lithium exchange with n-BuLi followed by treatment of resultant intermediates with B(Oi-Pr)3 and subsequent hydrolysis, which afforded final products
描述了基于各自的苯基和噻吩基硅烷核的一系列二硼酸和三硼酸的合成。最佳方案包括使用去质子化锂化或与正丁基锂进行卤素/锂交换,对各个芳基硅烷前体进行锂化,然后用B(O i -Pr)3处理所得中间体,然后进行水解,从而以高收率得到最终产物。确定了选定的二硼酸酯衍生物的X射线晶体结构,表明B(OH)2基团的氢键相互作用是控制超分子组装的主要因素。
Palladium-catalysed direct arylation of thiophenes tolerant to silyl groups
作者:Lu Chen、Julien Roger、Christian Bruneau、Pierre H. Dixneuf、Henri Doucet
DOI:10.1039/c0cc04302h
日期:——
The palladium catalysed 5-arylation of 2-(trimethylsilyl)thiophene with aryl bromides via C–H bond functionalisation allows the synthesis of arylated silylthiophenes in only one step.
Photolysis of 1,1,2,2-tetramethyl-1,2-bis-(2′-thienyl)disilane
作者:Shui-Sheng Hu、William P. Weber
DOI:10.1016/0022-328x(89)88003-9
日期:1989.6
Photolysis of 1,1,2,2-tetramethyl-1,2-bis-(2′-thienyl)disilane (I) in methanol/benzene leads to dimethyl-bis-(2′-thienyl)silane (III), 2-methoxydimethylsilylthiophene (IV) and 2-dimethylsilylthiophene (V) as a major products. The mechanism of this reaction, has been explored by use of methanol-d4. The predominant pathway leading to IV and V appears to involve direct reaction of methanol with the photoexcited
Syntheses and Electrical Properties of Organosilicon Polymers Containing Thiophene and Anthraquinone Units
作者:Sang Ho Yi、Syunsuke Ohashi、Hisaya Sato、Hiroyuki Nomori
DOI:10.1246/bcsj.66.1244
日期:1993.4
Organosiliconpolymerscontainingthiophene and anthraquinone units in the main chain were synthesized using palladium catalyst. These polymers were soluble and showed a small UV absorption change by the substituents on the silicon atom. Some of the polymers exhibit cation doping (n-doping) by the electrochemical reduction, and this doping process seemed to depend on the kinds of substituents on silicon
使用钯催化剂合成了主链中含有噻吩和蒽醌单元的有机硅聚合物。这些聚合物是可溶的,硅原子上的取代基显示出小的紫外吸收变化。一些聚合物通过电化学还原表现出阳离子掺杂(n-掺杂),这种掺杂过程似乎取决于硅原子上取代基的种类。当掺杂萘化钠时,这些聚合物显示出 3 × 10-5 S cm-1 的电导率。
Electrochemical synthesis of bis(2-thienyl) silanes, 2-thienylchlorosilanes, bis[5-(2-bromothienyl)]silanes, and 5-(2-bromothienyl) dimethylchlorosilane, precursors of poly[(silanylene)thiophene]s
Bis(2-thienyl)silanes and bis[5-(2-bromothienyl)]silanes were synthesized by electrochemical reduction of monohalothiophenes (Br,Cl) and 2,5-dibromothiophene respectively in the presence of a dichlorosilane in THF or LME, using an undivided cell, a sacrificial Mg or Al anode, a constant current density and tetrabutylammonium bromide as the supporting electrolyte. In addition, when dichlorosilanes were