3,4-Bis(trimethylsilyl)thiophene and several other 3,4-disubstituted thiophenes are synthesised by an unprecedented intermolecular cycloaddition–cycloreversion procedure between disubstituted acetylenes and 4-methyl- or 4-phenyl-thiazole; 3,4-bis(trimethylsilyl)thiophene undergoes consecutive regiospecific mono-ipso-iodination and palladium-catalysed reactions to provide unsymmetrically 3,4-disubstituted thiophenes.
3,4-双(三甲基
硅基)
噻吩以及其他几种3,4-二取代
噻吩通过二取代
乙炔和4-甲基或
4-苯基噻唑之间的前所未有的分子间环加成-环反转过程合成;3,4-双(三甲基
硅基)
噻吩经历连续的区域特异性单原位
碘化和
钯催化反应,生成非对称3,4-二取代
噻吩。