A potential greener protocol for peptide coupling reactions using recyclable/reusable ionic liquid [ $$\hbox {C}_{4}\hbox {-DABCO}][\hbox {N(CN)}_{2}$$ C 4 -DABCO ] [ N(CN) 2 ]

Development of greener methodologies in synthetic organic chemistry has brought awareness in recent decades due to the ecological performance of green solvent media and catalytic systems. Here, we carried out the peptide bond formation reaction in one of the environmentally secure solvents, ‘ionic liquids’ in the presence of coupling reagent and in the absence of external base at room temperature, affording dipeptides in good to excellent...