Preparation of unsymmetrical terphenyls via the nickel-catalyzed cross-coupling of alkyl biphenylsulfonates with aryl Grignard reagents
作者:Chul-Hee Cho、In-Sook Kim、Kwangyong Park
DOI:10.1016/j.tet.2004.03.072
日期:2004.5
were prepared by sequential transition metal-catalyzed cross-coupling reactions of neopentyl bromobenzenesulfonates with arylboronic acids and arylmagnesium bromides in good yields. Biphenylsulfonates undergo nickel-catalyzed coupling reactions more rapidly than the corresponding benzenesulfonates. The stepwise palladium- and nickel-catalyzed reaction of the bromobenzenesulfonates appears to be a promising
不对称的三联苯衍生物是通过新戊基溴苯磺酸盐与芳基硼酸和芳基溴化镁的连续过渡金属催化的交叉偶联反应制备的。联苯磺酸盐比相应的苯磺酸盐更快地经历镍催化的偶联反应。溴苯磺酸盐的逐步钯和镍催化反应似乎是制备不对称三联苯的有前途和概念上简单的方法。