[Ru(p-cymene)Cl2]2-catalyzed 1,4-addition reactions between arylboronic acids and butyl acrylate and acrylamide in the presence of phenols were investigated, good to excellent yields were obtained. The addition of phenols remarkably promoted the protonolysis and inhibited the β-H elimination of the 1,4-addition intermediates, and also efficiently suppressed the protonolysis of arylboronic acids.
以[Ru(p-cymene)Cl2]2为催化剂,研究了芳基
硼酸与丁基
丙烯酸酯和
丙烯酰胺在
酚类化合物存在下的1,4-加成反应,获得了良好的至优异的产率。
酚的添加显著促进了质子解离,抑制了1,4-加成中间体的β-H消除,并有效抑制了芳基
硼酸的质子解离。