The reaction of β‐nitroacrylates with pyrroles, under solvent‐ and catalyst‐free conditions, allows the formation of Friedel–Crafts adducts which, after in situ treatment with Amberlyst 15 in isopropyl alcohol under reflux, provide polysubstitutedindoles, via a benzannulation reaction, in a one‐pot process.
Herein, we present a new, efficient, one-potsynthesis of pyrrole-2-carboxylate derivatives startingfrom ketal-functionalized β-nitroacrylates in combination with primary amines under acidic heterogeneous conditions.
β-Nitroacrylates as Key Starting Materials for the Uncatalysed One-Pot Synthesis of Polyfunctionalized Dihydroquinoxalinone Derivatives, via an anti-Michael Reaction
The reaction of o-phenylenediamine with β-nitroacrylates allows the in situ preparation of dihydroquinoxalinones, via an anti-Michael reaction, under uncatalysed reaction conditions.