有机锂试剂攻击稠合的低聚噻吩的硫原子,产生可被合适的亲电试剂捕获的开环有机锂中间体。发现该反应对于稠合噻吩并[2,3- b ]-噻吩和某些[3,2- b ] -融合的低聚噻吩是普遍的。热力学(有机锂的碱度)和机理(RLi通过相邻硫的配位)方面控制反应的底物范围和区域选择性。当可以使底物竞争性去质子化时,与其他测试的有机锂相比,使用n -BuLi可观察到对开环的高选择性。最近发现的八硫代[8]环戊烯可产生多种开环产物。
[EN] HETEROACENES FOR ORGANIC ELECTRONICS<br/>[FR] HÉTÉROACÈNES POUR L'ÉLECTRONIQUE ORGANIQUE
申请人:BASF SE
公开号:WO2015128779A1
公开(公告)日:2015-09-03
The present invention provides compounds of formula 1 wherein X1 and X2 are independently from each other O, S or Se, and an electronic device comprising the compounds as semiconducting material.
A palladium-catalyzed synthesis of dibenzothiophenes from 2-biphenylthiols is described. This highly efficient reaction employs a simple PdCl2/DMSO catalytic system, in which PdCl2 is the sole metal catalyst and DMSO functions as an oxidant and solvent. This transformation has broad substrate scope and operational simplicity and proceeds in high yield. The synthetic utility was demonstrated by the
Lewis Acid/Brönsted Acid Mediated Benz-Annulation of Thiophenes and Electron-Rich Arenes
作者:Settu Muhamad Rafiq、Ramakrishnan Sivasakthikumaran、Arasambattu K Mohanakrishnan
DOI:10.1021/ol501006t
日期:2014.5.16
A facile preparation of benz-annulated heterocycles were achieved at rt involving a Lewis acid/Brönstedacidmediated annulation of heterocycles using 2,5-dimethoxytetrahydrofuran as a four-carbon synthon. The benz-/naphth-annulation was found to be successful with electron-rich arenes as well.
Synthesis of Chalcogenophenes<i>via</i>Cyclization of 1,3-Diynes Promoted by Iron(III) Chloride and Dialkyl Dichalcogenides
作者:Filipe N. Bilheri、André L. Stein、Gilson Zeni
DOI:10.1002/adsc.201401159
日期:2015.4.13
leads to 3,4‐bis(butylselanyl)selenophenes. The optimization studies showed that the reaction was best performed with equimolar amounts of iron(III) chloride and dibutyl diselenide in dichloromethane at 40 °C for 4 h. The method allows the synthesis of symmetrical and unsymmetrical selenophenes in moderate to good yields. A similar protocol was also extended to the synthesis of thiophene derivatives using
Electrochemical Synthesis of Thienoacene Derivatives: Transition‐Metal‐Free Dehydrogenative C−S Coupling Promoted by a Halogen Mediator
作者:Koichi Mitsudo、Ren Matsuo、Toki Yonezawa、Haruka Inoue、Hiroki Mandai、Seiji Suga
DOI:10.1002/anie.202001149
日期:2020.5.11
The first electrochemicaldehydrogenative C-S bondformation leading to thienoacene derivatives is described. Several thienoacene derivatives were synthesized by dehydrogenative C-H/S-H coupling. The addition of n Bu4 NBr, which catalytically promoted the reaction as a halogen mediator, was essential.