Scheme 1

Synthesis of furyl diazomethane and surface modification of Ag NPs. (i) furfuryl alcohol, diethyl azodicarboxylate, triphenylphosphine, THF, 0 °C → rt., 12 h (74%); (ii) NH₂NH₂·H₂O, HAc, EtOH, reflux, 24 h (86%); (iii) MnO₂, Na₂SO₄, KOH, dichloromethane, r.t., 2 h (98%); (iv) 120 °C; (v) Ag NPs.