Huang Xiao-Bing, Li Xian-Jing, Li Tian-Tian, Chen Bo, Chu Wen-Dao, He Long, Liu Quan-Zhong
Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering , China West Normal University , No. 1, Shida Road , Nanchong 637002 , P.R. China.
College of Pharmaceutical Sciences , Guizhou University of Chinese Medicine , Guiyang 550025 , P.R. China.
Org Lett. 2019 Mar 15;21(6):1713-1716. doi: 10.1021/acs.orglett.9b00274. Epub 2019 Mar 4.
Palladium-catalyzed asymmetric formal [3 + 2] cycloaddition of vinyl cyclopropanes and aldimines or isatin-derived ketimines proceeded smoothly in the presence of chiral phosphoramidite ligands. The corresponding highly functionalized and optically enriched pyrrolidine or spiro[pyrrolidin-3,2'-oxindole] derivatives are obtained in up to 94% yield and with up to 96% ee and 7:1 dr.
在手性亚磷酰胺配体存在下,钯催化乙烯基环丙烷与醛亚胺或异吲哚酮衍生的酮亚胺进行不对称形式的[3 + 2]环加成反应顺利进行。相应的高度官能化且光学富集的吡咯烷或螺[吡咯烷-3,2'-氧化吲哚]衍生物的产率高达94%,对映体过量率高达96%,非对映体比例为7:1。