A versatile catalyst system for Suzuki–Miyaura syntheses of sterically hindered biaryls employing a cyclobutene-1,2-bis(imidazolium) salt
作者:Andreas Schmidt、Alireza Rahimi
DOI:10.1039/c001362e
日期:——
The catalyst system consisting of 3,3â²-(3,4-bis(dichloro-methylene)cyclobut-1-ene-1,2-diyl)bis(1-methyl-1H-imidazolium) bis(tetrafluoroborate), Pd(OAc)2 and NaOtBu in toluene proved to be very effective for a broad variety of SuzukiâMiyaura reactions at room temperature. It is also suited for the synthesis of sterically hindered compounds including 2,6-di-tert-butyl-2â²-substituted biaryls at elevated temperatures.
由3,3′-(3,4-双(二氯亚甲基)环丁烯-1,2-二基)双(1-甲基-1H-咪唑鎓)双(四氟硼酸盐)、Pd(OAc)2和NaOtBu在甲苯中组成的催化剂系统证明在室温下对各种铃木–宫浦反应非常有效。它也适合在高温下合成空间位阻较大的化合物,包括2,6-双叔丁基-2′-取代的二芳烃。