Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK.
UCB Biopharma SPRL, Chemical Research R5, Chemin du Foriest, 1420, Braine-L'Alleud, Belgium.
Angew Chem Int Ed Engl. 2017 Feb 6;56(7):1864-1868. doi: 10.1002/anie.201611067. Epub 2017 Jan 11.
We report herein the asymmetric coupling of flow-generated unstabilized diazo compounds and propargylated amine derivatives, using a new pyridinebis(imidazoline) ligand, a copper catalyst and base. The reaction proceeds rapidly, generating chiral allenes in 10-20 minutes with high enantioselectivity (89-98 % de/ee), moderate yields and a wide functional group tolerance.
我们在此报告了在一种新型吡啶双(咪唑啉)配体、铜催化剂和碱的作用下,通过流动产生的未稳定重氮化合物和炔丙基胺衍生物的不对称偶联。该反应在 10-20 分钟内迅速进行,以高对映选择性(89-98% de/ee)、中等收率和广泛的官能团耐受性生成手性丙二烯。