Addition of 4-(cyclohex-1-en-1-yl)morpholine on 3-nitroindole: an unprecedented dearomatizing process?

Organic & Biomolecular Chemistry Pub Date: 2016-01-12 DOI: 10.1039/C5OB02595H

Abstract

Nucleophilic enamines add spontaneously on heteroarenes 3-nitroindole and benzofuran to form a new C–C bond. With nitroindole 1 and enamine 2a, an unprecedented dearomatizing formal ene reaction occurs in a totally regio- and diastereo-selective manner. With 3-nitrobenzofuran 10 and enamine 2d, the reaction course is different and leads to the generation of a dienylphenol.

Graphical abstract: Addition of 4-(cyclohex-1-en-1-yl)morpholine on 3-nitroindole: an unprecedented dearomatizing process
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