Nickel-Catalyzed Benzylic Substitution of Benzyl Esters with Malonates as a Soft Carbon Nucleophile
作者:Hiroaki Tsuji、Keisuke Hashimoto、Motoi Kawatsura
DOI:10.1021/acs.orglett.9b03475
日期:2019.11.1
The nickel-catalyzed benzylic substitution of benzyl alcohol derivatives with a soft carbon nucleophile is extremely rare compared to that with a hard carbon nucleophile. We have achieved the nickel-catalyzed benzylic substitution of benzyl esters with malonates as a soft carbon nucleophile. Primary and secondary benzyl 2,3,4,5,6-pentafluorobenzoates as well as a wide variety of malonate derivatives
与用硬碳亲核试剂相比,用软碳亲核试剂对苯甲醇衍生物进行镍催化的苄基取代极为罕见。我们已经实现了丙二酸酯作为软碳亲核试剂的镍催化苄基酯的苄基取代。2,3,4,5,6-五氟苯甲酸苄酯和仲苄酯以及各种丙二酸酯衍生物在镍催化的反应中具有良好的耐受性,以46-86%的收率提供了相应的烷基化产物(34个实例)。此外,我们提出了一种可能的反应机理,将经由η经历1 -和η 3个-benzylnickel中间体。