Environmentally friendly one-pot synthesis of amides, bis-amides and dipeptides by mechanochemical carbodiimide-mediated coupling of carboxylicacids and amines is described; high reaction yields and simple aqueous work-up allow for the clean, practical and fast preparation of a variety of compounds containing the amide bond from readily accessible reagents.
presence of a strong intermolecular N-H•••O interaction. In case of 7, the possibility of such an interaction is obviated by the formation of an intramolecular N-H•••O hydrogen bond. An additional feature of the crystal packing for 1—6 is the significant roles that C—H•••π contacts play in generating three dimensional networks. In contrast for 7, the intramolecularN—H•••O hydrogen bond precludes the formation