Direct additive-free N-formylation and N-acylation of anilines and synthesis of urea derivatives using green, efficient, and reusable deep eutectic solvent ([ChCl][ZnCl₂]₂).

Introduction Amides are an extremely significant class of compounds with multiple uses in both the commercial and academic communities 1 , which are used in drugs (Fig. 1 ) 2 , 3 , dyes, natural products, and a wide range of polymers 4 – 6 .

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