Synthesis of<i>P</i>-Stereogenic Phosphinamides via Pd(II)-Catalyzed Enantioselective C–H Alkynylation
作者:Tao Zhou、Ling-Jie Fan、Zi-Jia Chen、Meng-Xue Jiang、Pu-Fan Qian、Xinquan Hu、Kun Zhang、Bing-Feng Shi
DOI:10.1021/acs.orglett.3c01865
日期:2023.8.11
compounds. Herein, we report Pd(II)-catalyzed enantioselective C–H alkynylation using cheap commercially available l-pyroglutamic acid as a chiral ligand. A range of structurally diverse P-stereogenic phosphinamides was prepared in good yields with high enantioselectivities via desymmetrization and kinetic resolution. A tailor-made congested directing group, N-ethyl-N-(3-methylpyridin-2-yl)amino, was
P-立体膦酰胺代表手性有机催化剂和生物活性化合物中的重要结构元素。在此,我们报道了使用廉价的市售L-焦谷氨酸作为手性配体,Pd(II) 催化的对映选择性 C-H 炔基化反应。通过去对称化和动力学拆分,以良好的收率和高对映选择性制备了一系列结构多样的P -立体膦酰胺。定制的拥挤导向基团N-乙基-N- (3-甲基吡啶-2-基)氨基对于反应活性至关重要。