Aromatic Ring-Opening of 2-Fluorobenzothiophenes by Alkyllithiums
作者:Michel Belley、Zohra Douida、John Mancuso、Marc De Vleeschauwer
DOI:10.1055/s-2004-837230
日期:——
Diphenylacetylenes are obtained when alkyllithium reagents are added to 3-aryl-2-fluorobenzothiophenes at low temperature. The aromatic ring-opening mechanism involves a nucleophilic addition of the alkyllithium to the sulfur atom of the thiophene. The resulting 2,2-diaryl-1-fluorovinyl anion subsequently undergoes a Fritsch-Buttenburg-Wiechell rearrangement to afford the diphenylacetylene.
Aromatic Ring Opening of Fused Thiophenes via Organolithium Addition to Sulfur
作者:B. Hill、M. De Vleeschauwer、K. Houde、M. Belley
DOI:10.1055/s-1998-1674
日期:1998.4
Organolithium reagents can add to the sulfur atom of thiophenes that are substituted by a chlorine atom and fused to another aromatic system, at -78 °C, to give ortho-substituted aryl sulfides.
有机锂试剂可以与被氯原子取代并与另一个芳族系统稠合的噻吩的硫原子加成,在 -78 °C 下,得到邻位取代的芳基硫化物。