An N-Trifluoromethylation/Cyclization Strategy for Accessing Diverse N-Trifluoromethyl Azoles from Nitriles and 1,3-Dipoles
Ru Zhong Zhang
Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, College of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun, 130024 China
Search for more papers by this authorRu Xue Zhang
Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, College of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun, 130024 China
Search for more papers by this authorShuang Wang
Institute of Functional of Material, College of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun, 130024 China
Search for more papers by this authorCorresponding Author
Dr. Cong Xu
Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, College of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun, 130024 China
Search for more papers by this authorCorresponding Author
Prof. Wei Guan
Institute of Functional of Material, College of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun, 130024 China
Search for more papers by this authorCorresponding Author
Prof. Mang Wang
Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, College of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun, 130024 China
Search for more papers by this authorRu Zhong Zhang
Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, College of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun, 130024 China
Search for more papers by this authorRu Xue Zhang
Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, College of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun, 130024 China
Search for more papers by this authorShuang Wang
Institute of Functional of Material, College of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun, 130024 China
Search for more papers by this authorCorresponding Author
Dr. Cong Xu
Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, College of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun, 130024 China
Search for more papers by this authorCorresponding Author
Prof. Wei Guan
Institute of Functional of Material, College of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun, 130024 China
Search for more papers by this authorCorresponding Author
Prof. Mang Wang
Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, College of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun, 130024 China
Search for more papers by this authorGraphical Abstract
A scalable N-trifluoromethylative cyclization strategy is reported to construct N-CF3 tetrazoles/imidazoles/1,2,3-triazoles. N-CF3 nitrilium derivatives are obtained via the N-trifluoromethylation of nitriles and well used as NCF3-containing synthons in 1,3-dipolar cyclizations for the first time. A generic platform for accessing diverse N-CF3 azoles is thus provided.
Abstract
N-Trifluoromethyl azoles are valuable targets in medicinal chemistry, but their synthesis is challenging. Classical preparation of N-CF3 azoles relies on the functional group interconversions but suffers from tedious N-pre-functionalization and unfriendly agents. Introduction of the CF3 onto the nitrogen of heterocycles provides a direct route to such motifs, but the N-trifluoromethylation remains underdeveloped. Reported here is an alternative and scalable cyclization strategy based on NCF3-containing synthons for constructing N-CF3 azoles. The approach involves the N-trifluoromethylation of nitriles followed by a [3+2] cyclization between resulting N-CF3 nitrilium derivatives and 1,3-dipoles. PhICF3Cl was an effective CF3 source for the transformation. As a result, a generic platform is established to divergently synthesize N-trifluoromethylated tetrazoles, imidazoles, and 1,2,3-triazoles by using sodium azide, activated methylene isocyanides, and diazo compounds as dipoles.
Conflict of interest
The authors declare no conflict of interest.
Supporting Information
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