Silver-catalyzed synthesis of 5-aryl-3-trifluoromethyl pyrazoles - Details

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Abstract：

A　silver-catalyzed　synthesis　of　5-aryl-3-trifluoromethyl　pyrazoles　from　reaction　of　various　N′-benzylidene　tolylsulfonohydrazides　with　ethyl　4,4,4-trifluoro-3-oxobutanoate　is　described.　The　reaction　proceeds　via　sequential　nucleophilic　addition,　intramolecular　cyclization,　elimination,　and　[1,5]-H　shift　steps　to　afford　the　trifluoromethylated　pyrazole　products　in　moderate　to　excellent　yields.　The　reaction　is　compatible　with　a　variety　of　functional　groups.　©　2019　Elsevier　Ltd

Keyword：

Fluorine; Pyrazole; Silver; Trifluoromethyl

Community：

[ 1 ] [Xu, Y.]State Key Laboratory of Photocatalysis on Energy and Environment, and Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, College of Chemistry, Fuzhou University, Fuzhou, 350108, China
[ 2 ] [Chen, Q.]State Key Laboratory of Photocatalysis on Energy and Environment, and Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, College of Chemistry, Fuzhou University, Fuzhou, 350108, China
[ 3 ] [Tian, Y.]State Key Laboratory of Photocatalysis on Energy and Environment, and Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, College of Chemistry, Fuzhou University, Fuzhou, 350108, China
[ 4 ] [Wu, W.]State Key Laboratory of Photocatalysis on Energy and Environment, and Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, College of Chemistry, Fuzhou University, Fuzhou, 350108, China
[ 5 ] [You, Y.]State Key Laboratory of Photocatalysis on Energy and Environment, and Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, College of Chemistry, Fuzhou University, Fuzhou, 350108, China
[ 6 ] [Weng, Z.]State Key Laboratory of Photocatalysis on Energy and Environment, and Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, College of Chemistry, Fuzhou University, Fuzhou, 350108, China

Reprint 's Address：

[Wu, W.]State Key Laboratory of Photocatalysis on Energy and Environment, and Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, College of Chemistry, Fuzhou UniversityChina

Email：

1096258149@qq.com

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Source ：

Tetrahedron Letters

ISSN： 0040-4039

Year： 2020

Issue： 5

Volume： 61

2 . 4 1 5

JCR@2020

1 . 5 0 0

JCR@2023

ESI HC Threshold：160

JCR Journal Grade：3

CAS Journal Grade：4

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SCOPUS Cited Count：

ESI Highly Cited Papers on the List： 0 Unfold All

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30 Days PV： 0

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