First asymmetric decarboxylative cyanomethylation of isatins is reported herewith using bifunctional thiourea derived from L-proline in good yields and enantioselectivities. This strategy enables the construction of various 3-cyanomethylene substituted 3-hydroxyoxindoles in enantioselective manner. Enantioselective synthesis of CPC-1 alkaloid has been accomplished in fewer steps.
首次报道了使用源自
L-脯氨酸的双功能
硫脲进行不对称脱羧
氰甲基化的结果,良好的产率和对映选择性。这一策略使得以对映选择性的方式构建多种3-
氰甲基取代的3-羟基氧化
吲哚成为可能。CPC-1
生物碱的对映选择性合成已经在更少的步骤中完成。