Regioselective Synthesis of 3‐Trifluoromethyl 4‐Subtituted Pyrazoles by [3+2] Cycloaddition of Trifluoroacetonitrile Imines and Nitroalkenes
Ke‐Hu Wang, Haimei Liu, Xiaoling Liu, Chang Bian, Junjiao Wang, Yingpeng Su, Danfeng Huang, Yulai Hu
Abstract
Abstract An efficient cycloaddition reaction of trifluoroacetohydrazonoyl bromides with nitroolefins was developed, which regioselectively produced 3‐trifluoromethyl‐4‐substituted pyrazoles. The reaction has the advantages of mild conditions, good tolerance of functional groups and simple operation.
Topics & Concepts
ChemistryRegioselectivityCycloadditionTrifluoromethylOrganic chemistryCombinatorial chemistryMedicinal chemistryCatalysisAlkylFluorine in Organic ChemistrySynthesis and Reactions of Organic CompoundsSynthesis and Biological Evaluation