<i>N</i>,<i>N</i>-Dimethyl-β-alanine as an Inexpensive and Efficient Ligand for Palladium-Catalyzed Heck Reaction
作者:Xin Cui、Zhe Li、Chuan-Zhou Tao、Yu Xu、Juan Li、Lei Liu、Qing-Xiang Guo
DOI:10.1021/ol060585n
日期:2006.6.1
phosphine-free ligand than the previously reported ligand, N,N-dimethylglycine, in the Pd-catalyzed Heck reaction for a variety of aryl bromides, aryl iodides, and activated aryl chlorides with a practical turnover number of 10(3). Both kinetic and theoretical studies suggested that N,N-dimethyl-beta-alanine led to faster oxidative addition of an aryl halide to Pd than N,N-dimethylglycine. [reaction: see text]
在钯催化的多种芳基溴化物,芳基碘化物和碘化物的Heck反应中,N,N-二甲基-β-丙氨酸是一种比以前报道的配体N,N-二甲基甘氨酸更有效的无膦配体。实际营业额为10(3)的活化的芳基氯化物。动力学和理论研究均表明,N,N-二甲基-β-丙氨酸比N,N-二甲基甘氨酸能更快地将芳基卤化物氧化成Pd。[反应:看文字]