This paper reports a one-pot synthesis of the title bromides (in 20-88% crude yields) from iodoarenes oxidized with the CrO3/AcOH/Ac2O/H2SO4 liquid mixture, then coupled in situ with arenes and, finally, precipitated out with a KBr solution. Similarly, diaryliodonium perchlorates and iodides are obtained in 40-89% crude yields. Oxidative anion metatheses in the crude title bromides produce the respective pure diaryliodonium tetrafluoroborates, tosylates, trifluoroacetates, hydrosulfates, nitrates, and chlorides in 57-80% yields. These new preparative procedures are easier and shorter than many earlier methods.
本文报告了用
CrO3/AcOH/Ac2O/H2SO4 液体混合物氧化
碘代烯烃,然后在原位与
炔烃偶联,最后用 KBr 溶液沉淀的单锅法合成标题
溴化物(粗产率为 20-88%)的过程。同样,也可以获得粗产率为 40%-89% 的二芳
碘高氯酸盐和
碘化物。在粗标题
溴化物中进行氧化阴离子偏析,可得到相应的纯二芳
碘四
氟硼酸盐、
对甲苯磺酸盐、
三氟乙酸盐、
硫酸盐、
硝酸盐和
氯化物,粗产率为 57-80%。这些新的制备程序比许多早期的方法更简单、更短。