Kinetic Resolution of 2,3-Dihydro-2-substituted 4-Quinolones by Palladium-Catalyzed Asymmetric Allylic Alkylation
作者:Bai-Lin Lei、Chang-Hua Ding、Xiao-Fei Yang、Xiao-Long Wan、Xue-Long Hou
DOI:10.1021/ja9082717
日期:2009.12.30
The kinetic resolution of a carbon nucleophile is realized for the first time via Pd-catalyzed asymmetric allylic alkylation with "unstabilized" ketone enolates as the nucleophile, providing both allylated 2,3-disubstituted 2,3-dihydro-4-quinolones and recovered substrates in high yields and high ee (S-factor is 40-145). The application of the methodology in organic synthesis is demonstrated by the
碳亲核试剂的动力学拆分首次通过 Pd 催化的不对称烯丙基烷基化实现,“不稳定的”酮烯醇化物作为亲核试剂,提供烯丙基化的 2,3-二取代 2,3-二氢-4-喹诺酮和回收的底物高产量和高 ee(S 因子为 40-145)。该方法在有机合成中的应用通过烯丙基化加合物向吡咯并 [3,2-c] 喹啉的快速转化来证明,吡咯并 [3,2-c] 喹啉具有生物活性 Martinella 生物碱的核心结构。