Synthesis of 3-perfluoroalkyl-, including 3-trifluoromethyl-, substituted pyrazoles from perfluoroalkylacetylenes
摘要:
3-Perfluoroalkylpyrazoles 2 have been prepared in excellent yield by the reactions of perfluoroalkylacetylenes 1 with hydrazine monohydrate under mild conditions.
A copper-catalyzed one-pot perfluoroalkylation of alkynyl bromides and terminal alkynes has been disclosed, and the corresponding perfluoroalkylated alkynes could be attained in good to excellent yields. The new straightforward transformation shows high efficiency (0.01–0.5 mol % catalyst loading), broad substrate scope, and remarkable functional group tolerance and provides a facile approach for useful
Silver-Mediated Perfluoroalkylation of Terminal Alkynes with Perfluoroalkyl Iodides
作者:Junlan Li、Lihua Liu、Kaiting Zheng、Chenggong Zheng、Hua Xiao、Shilu Fan
DOI:10.1021/acs.joc.0c00894
日期:2020.7.2
The incorporation of a perfluoroalkyl group (RF) into drug candidates has become an increasingly important strategy in drug molecule design. In this study, the silver-mediated perfluoroalkylation reaction based on the addition–elimination process of terminal alkynes which was initiated by a perfluoroalkyl radical to form a C(sp)–RF bond has been developed. The reaction proceeds under mild conditions
Perfluoro-n-heptylcopper(I) has been treated with 1-hexyne and 1-decyne to give 1-perfluoro-n-heptyl-1-hexene and-1-decene respectively. Reaction of the copper derivative with propargyl bromide and 3-hydroxy-3-methyl-1-butyne yielded 1-perfluoro-n-heptyl-1,2-propadiene and 1-perfluoroheptyl-3-methyl-1,2-butadiene respectively. Reactions of perfluoroalkylcopper(1) compounds CF3(CF2)nCu(n = 4—8) with
Visible light photocatalytic cross-coupling and addition reactions of arylalkynes with perfluoroalkyl iodides
作者:Yelan Xiao、Yuen-Kiu Chun、Shun-Cheung Cheng、Ruoyang Liu、Man-Kit Tse、Chi-Chiu Ko
DOI:10.1039/d0ob01767a
日期:——
of arylalkynes with perfluoroalkyl iodides have been developed. Through slight modifications of the reaction conditions, reactions that are selective for the preparation of the C–C coupling product (perfluoroalkyl alkynes) and the addition products (iodo-perfluoroalkyl substituted alkenes) can be achieved. These reactions work well with different types of alkynes and perfluoroalkyl iodides. As the iodide
Alkenyl, allyl, and alkynylstannanes react with perfluoroalkyliodides in the presence of a catalytic amount of Pd(PPh3)4 to give alkenes and alkynes bearing perfluoroalkyl group.