The first oxazol-4-ylboronates were prepared from the corresponding 4-bromo- and 4-trifluoromethanesulfonyloxy-oxazoles. The Suzuki coupling using the resulting boron reagents with various aryl halides, including benzene, pyridine, oxazole and thiazole rings, in the presence of palladium catalyst proceeded to produce the oxazole-containing biaryl compounds in moderate to good yields.
第一个
恶唑-4-基
硼酸酯由相应的4-
溴-和4-三
氟甲磺酰氧基-
恶唑制备。在
钯催化剂的存在下,使用所得硼试剂与各种芳基卤化物(包括苯、
吡啶、
恶唑和
噻唑环)进行 Suzuki 偶联,以中等至良好的产率制备含
恶唑的联芳基化合物。