73882-41-4 3-溴-4-碘噻吩
词条详情加载中…
词条详情加载中…
用途与制备
产率:78% 合成条件:Stage #1: With n-butyllithium In diethyl ether at -78℃; for 1 h; Inert atmosphere Stage #2: With iodine In diethyl ether at -78 - 25℃; for 1 h; 实验步骤:1)根据图1中的流程图制备1)将3,4-二溴噻吩(24.2g,100mmol)溶于无水乙醚,保护N2,冷却至-78,N-BuLi(66ml,105mmol, 缓慢滴加1.6M),在-78℃下反应1小时后。 0> C,I 2(26.67g,105mmol)继续搅拌1小时并温热至室温(25℃)。将反应溶液用NaHSO 3淬灭,用乙醚萃取,经Mg 2 SO 4干燥,干燥并减压蒸馏,得到 3-溴-4-碘噻吩(22.55g,78%)彩色液体2。 参考文献: