作者:You, Pengyuan、Liu, Minjie、Zhang, Ke、Yang, Fan、Tan, Zequn、Chen, Fener
DOI:10.1039/d4ob00518j
日期:——
A palladium-catalyzed decarboxylative asymmetric [4 + 2] annulation of methyleneindolinones with a zwitterionic oxo-1,4-dipole intermediate was successfully developed to access spirocyclic oxindoles bearing two vicinal stereocenters in good yields with high diastereoselectivities and enantioselectivities. This strategy features a broad substrate scope (28 examples), allowing for efficient scale-up
成功开发了一种钯催化的亚甲基二氢吲哚酮与两性离子氧代-1,4-偶极中间体的脱羧不对称[4 + 2]成环反应,以良好的收率获得具有两个邻位立构中心的螺环羟吲哚,并具有高非对映选择性和对映选择性。该策略具有广泛的底物范围(28 个示例),可实现高效的放大。对产品进行了进一步的选择性转化和初步的机理研究。