A　copper-catalyzed　interrupted　click　reaction　for　the　preparation　of　3-difluoromethyl-substituted　1,2,4-triazinones　is　developed.　The　reaction　of　terminal　alkyne　with　azide　and　difluoroacetic　anhydride　affords　the　desired　products　in　moderate　to　good　yields.　This　method　provides　ready　access　to　3-difluoromethyl　1,2,4-triazinones,　notable　synthetic　targets,　from　simple,　readily　available　starting　materials.　Additionally,　the　reaction　with　chlorodifluoroacetic　anhydride　affords　the　corresponding　3-chlorodifluoromethyl-substituted　1,2,4-triazinones.　©　2019　Elsevier　B.V.