by deprotonation of 2-(methyl-thio)-1,3-benzodithioles with n-butyllithium in THF; these anions are protonated (aqueous NH4Cl) or methylated (MeI) as expected, but undergo an unexpected, overall carbophilic addition reaction with cyclic trithiocarbonates to yield, after alkylation, unsymmetrical hexathioorthooxalates, compounds which have been difficult to prepare by traditional methods.
通过在邻
苯三硫代碳酸酯中进行
甲基锂的巯基加成反应或在
正丁基锂中通过2-(甲
硫基)-
1,3-苯并二硫醇的去质子化反应,很容易生成2-Lithio-2-(甲
硫基)-
1,3-苯并二硫醇。 THF; 这些阴离子已按预期质子化(NH 4 Cl
水溶液)或
甲基化(MeI),但与环状
三硫代碳酸酯进行了意想不到的整体嗜
碳加成反应,烷基化后生成不对称的六
硫代原
草酸酯,这些化合物难以通过传统方法制备。