“…On the other hand, N , N ‐dimethylformamide (DMF) is an excellent polar solvent wildly used in almost all laboratories. More importantly, DMF can act as reactant to incorporate CO, HCO, Me 2 N, Me 2 NCO and “C” (to form CN) units into products ,. Besides, DMF has also been reported to be an effective ligand for various metals, such as Cu(II), Ag(I), Au(III) and Pd(II), and DMF was able to further reduce these metal complexes under suitable conditions ,.…”