Litcius/Paper detail

Catalytic Asymmetric C-7 Friedel–Crafts Alkylation/<i>N</i>-Hemiacetalization of 4-Aminoindoles

Hualing He, Yang Cao, Jun Xu, Jon C. Antilla

2021Organic Letters34 citationsDOI

Abstract

A unique catalytic asymmetric C-7 Friedel–Crafts alkylation/N-hemiacetalization cascade reaction of 4-aminoindoles with β,γ-unsaturated α-keto esters has been described. Using a chiral magnesium H8–BINOL-derived bis(phosphate) complex as catalyst, the resulting functionalized 1,7-annulated indole scaffolds are obtained in high yields (up to 98%) and with good to excellent enantioselectivities (up to 99%) and diastereoselectivities (up to >20:1) under mild reaction conditions.

Topics & Concepts

Friedel–Crafts reactionChemistryCatalysisAlkylationIndole testOrganic chemistryCascadeCombinatorial chemistryMedicinal chemistryChromatographyAsymmetric Synthesis and CatalysisAsymmetric Hydrogenation and CatalysisChemical Synthesis and Reactions