An　efficient　and　general　method　for　the　synthesis　of　3-trifluoromethyl-4　trifluoroacetyl　pyrazoles　from　the　cycloaddition　of　sydnones　with　1,1,1,5,5,5-hexafluoropentane-2,4-dione　has　been　established.　Using　ZnI2/bpy　as　a　catalyst　in　THF,　this　protocol　proved　to　be　general　to　prepare　a　variety　of　3-trifluoromethyl-4　trifluoroacetyll　pyrazoles　in　good　yields.　Utility　of　this　method　was　demonstrated　by　further　transformations　of　the　trifluoroacetyl　moiety　providing　convenient　access　to　3　trifluoromethyl　pyrazole-based　carboxylic　acid　and　alcohol　derivatives.　(C)　2022　Elsevier　Ltd.　All　rights　reserved.