A silver‐catalyzed regioselective one‐pot cyclization reaction of diazo reagents with fluoronitroalkenes was developed. This transformation presents a method for accessing a series of 4‐aryl‐3‐fluoropyrazoles that are substituted with various groups such as trifluoromethyl, carboxylic ester, nitrile, and phosphonate ester. Further synthetic transformations offered the corresponding fluorinated and trifluoro‐methylated analogues of two fungicide compounds.

中文翻译：

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银催化重氮试剂与氟硝基烯烃的一锅环化反应区域选择性合成多取代氟吡唑

开发了重氮试剂与氟硝基烯烃的银催化区域选择性一锅环化反应。这种转化提供了一种获得一系列被各种基团取代的 4-芳基-3-氟吡唑的方法，例如三氟甲基、羧酸酯、腈和膦酸酯。进一步的合成转化提供了两种杀菌剂化合物相应的氟化和三氟甲基化类似物。