Sc takes action: The highly enantioselectivehydroxyaminationreaction of N‐unprotected 2‐oxindoles with nitrosoarenes has been realized using the Sc(OTf)3/L1 complex. The catalyst system exhibited remarkably broad substrate scope and high efficiency. This transformation is the first example of a chiral ScIII/enolate activating a nitrosoarene, and can be conducted on a gram scale without loss in the
Sc发挥作用:使用Sc(OTf)3 / L1络合物实现了N-未保护的2-氧吲哚与亚硝基芳烃的高度对映选择性羟基胺化反应。该催化剂体系表现出显着的底物范围和高效率。该转化是手性Sc III /烯酸酯活化亚硝基芳烃的第一个实例,并且可以以克级进行,而不会损失ee 值。
Iron-Catalyzed Batch/Continuous Flow C–H Functionalization Module for the Synthesis of Anticancer Peroxides
作者:Moreshwar B. Chaudhari、Suresh Moorthy、Sohan Patil、Girish Singh Bisht、Haneef Mohamed、Sudipta Basu、Boopathy Gnanaprakasam
DOI:10.1021/acs.joc.7b02854
日期:2018.2.2
with aliphatic peroxide was developed under mild conditions. A library of linear alkylated and arylated peroxides are synthesized in good to excellent yield. This method is highly selective and general for a range of biologically important derivatives of 2-oxindole, barbituric acid, and 4-hydroxy coumarin with a good functional group tolerance and without the cleavage of the peroxide bond. This peroxidation
A practical strategy has been developed for the bioinspired and ligand-regulated chemoselective unnatural prenylation and geranylation of oxindoles with isoprene under Pd catalysis. The selectivity was governed by modulating the coordination geometry of the Pd catalyst.