Journal
ORGANIC LETTERS
Volume 16, Issue 2, Pages 576-579Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol403447g
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- NSFC [21002044]
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An efficient synthesis of 1,3,5-trisubstituted pyrazoles from N-alkylated tosylhydrazones and terminal alkynes was developed. The protocol was applied to a wide range of substrates and demonstrated excellent tolerance to a variety of substituents, including both electron-donating and -withdrawing groups. In comparison with the common approaches for substituted pyrazole syntheses, this methodology proceeded with complete regioselectivity, especially, in the cases that R-2 and R-3 are similar substituents.
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