A　silver-catalyzed　synthesis　of　5-aryl-3-trifluoromethyl　pyrazoles　from　reaction　of　various　N＇-benzylidene　tolylsulfonohydrazides　with　ethyl　4,4,4-trifluoro-3-oxobutanoate　is　described.　The　reaction　proceeds　via　sequential　nucleophilic　addition,　intramolecular　cyclization,　elimination,　and　[1,5]-H　shift　steps　to　afford　the　trifluoromethylated　pyrazole　products　in　moderate　to　excellent　yields.　The　reaction　is　compatible　with　a　variety　of　functional　groups.　(C)　2019　Elsevier　Ltd.　All　rights　reserved.