Grignard Addition to Imines Derived from Isatine: A Method for the Asymmetric Synthesis of Quaternary 3-Aminooxindoles
作者:Giordano Lesma、Nicola Landoni、Tullio Pilati、Alessandro Sacchetti、Alessandra Silvani
DOI:10.1021/jo900623c
日期:2009.6.19
Addition of Grignard reagents to chiral imines derived from isatine afforded chiral, optically enriched 3-substituted 3-aminooxindoles in satisfactory yields and diastereoisomeric ratios. A general protocol is described for the addition of alkyl, alkenyl, and aryl Grignard reagents. In one case, the absolute configuration at C3 was determined and the selective N-deprotection was described, enabling
将格利雅试剂添加到衍生自异氰酸的手性亚胺上,以令人满意的收率和非对映异构体比率提供了手性的,光学富集的3-取代的3-氨基羟吲哚。描述了添加烷基,烯基和芳基格氏试剂的通用方案。在一种情况下,确定了C 3处的绝对构型并描述了选择性的N-脱保护,使得能够进一步合成转化反应产物。