Metallation reactions. XXI. Metallation of alkyl (alkylthio) benzenes by superbases versus organolithium compounds
作者:Salvatore Cabiddu、Claudia Fattuoni、Costantino Floris、Stefana Melis、Alessandro Serci
DOI:10.1016/s0040-4020(01)90456-9
日期:1994.1
The metallation regiochemistry of alkyl(alkylthio)benzenes with butyllithium or with the superbasic mixture of butyllithium with potassium tert-butoxide is described. The reaction pattern depends on the substrate and the reagent. Butyllithium monometallates the thiomethylic carbon of methyl (methylthio) benzenes and bimetallates the thiomethylic and the annular carbon ortho to the thioethereal group
描述了烷基(烷硫基)苯与丁基锂或丁基锂与叔丁醇钾的超碱性混合物的金属化区域化学。反应模式取决于底物和试剂。丁基锂单金属化甲基(甲硫基)苯的硫代甲基碳,而双金属化硫代甲基和与硫醚基团邻位的环状碳。在具有超强碱的情况下,金属化发生在硫代甲基和甲基碳上。与较高同系物的丁基锂的金属化仅将邻位氢取代为硫代烷基,而超碱也将碳原子α攻击为硫代烷基取代基。