research on building blocks for synthesis of natural products. The nano-silver catalyst initiates O -alkylation of the amides by heteroalkyl halides. Reaction of equimolar 3-acetyl-6-chloro-4-phenylquinolin-2(1 H )-one and 2-chloro-3-(chloromethyl)quinolines in the presence of silver nanoparticles in DMSO solution under reflux condition leads to the formation of 1-1-[2-chloroquinolin-3-yl)methoxy]