Synergistic Cu/Pd-catalyzed asymmetric allylation: a facile access to α-quaternary cysteine derivatives
作者:Hui-Min Wu、Zongpeng Zhang、Liang Wei、Xiu-Qin Dong、Chun-Jiang Wang
DOI:10.1039/d1cc01754c
日期:——
cysteine derivatives via asymmetric catalytic α-allylation of readily available 2-thiazoline-4-carboxylates was successfully developed through a synergistic Cu/Pd catalytic system. A wide array of α-quaternary cysteine derivatives were obtained in moderate to high yields with good to excellent enantioselectivities (45–98% yields and 69–>99% ee). Gram-scale asymmetric allylation was performed to obtain high
通过协同 Cu/Pd 催化系统成功地开发了一种有效的合成方法,通过不对称催化 α-烯丙基化容易获得的 2-thiazoline-4-carboxylates获得生物学上重要且合成有用的 α-季铵半胱氨酸衍生物。以中等至高产率获得了多种 α-季铵半胱氨酸衍生物,具有良好至极好的对映选择性(45-98% 产率和 69->99% ee)。进行克级不对称烯丙基化以获得保持对映选择性的高产率。此外,获得手性螺环化合物的一些合成转化进展顺利,这展示了该方法的重要效用。