Direct perfluoroalkylation of coumarins by perfluoroalkyl iodides in the presence of sodium hydroxymethanesulphinate (Rongalite)
作者:Bingnan Huang、Jintao Liu、Weiyuan Huang
DOI:10.1039/c39900001781
日期:——
C(3) substituted perfluoroalkylcoumarins are prepared readily by the reaction of coumarins with perfluoroalkyl iodides in the presence of sodium hydroxymethanesulphinate (Rongalite).
Fe and Ni-catalyzed electrochemical perfluoroalkylation of C—H bonds of coumarins
作者:M. N. Khrizanforov、S. O. Strekalova、V. V. Grinenko、V. V. Khrizanforova、T. V. Gryaznova、Yu. H. Budnikova
DOI:10.1007/s11172-017-1906-5
日期:2017.8
A new method for the preparation of perfluoroalkylcoumarins in a single step is developed. The compounds are prepared via electrocatalytic reduction of a 1 : 1 mixture of an aromatic compound (coumarin, 6-methylcoumarin, and 7-methylcoumarin) and a fluoroalkylating reagent under mild conditions (room temperature, normal pressure) using [bipyFeII] or [bipyNiII] complexes as catalysts. The developed
Huang, Bing-Nan; Liu, Jin-Tao; Huang, Wei-Yuan, Journal of the Chemical Society. Perkin transactions I, 1994, # 1, p. 101 - 104
作者:Huang, Bing-Nan、Liu, Jin-Tao、Huang, Wei-Yuan
DOI:——
日期:——
Visible-Light-Driven, Photoredox-Catalyzed Cascade of <i>ortho-</i>Hydroxycinnamic Esters To Access 3-Fluoroalkylated Coumarins
作者:Dan Song、Chao-Ming Wang、Zhi-Peng Ye、Peng-Ju Xia、Zhi-Xiong Deng、Jun-An Xiao、Hao-Yue Xiang、Hua Yang
DOI:10.1021/acs.joc.9b00715
日期:2019.6.7
A general and straightforward protocol for di-/perfluoroalkylation of ortho-hydroxycinnamic esters via a photoredox-catalyzed cascade was developed to access a variety of 3-fluoroalkylated coumarins. This method was characterized by all-in-one synthetic design, simplified operation, mild reaction conditions, and broad substrate scope. Moreover, a sequential one-pot procedure starting from commercially available salicylaldehyde was also successfully realized to synthesize 3-fluoroalkylated coumarins.
The reaction of sodium perfluoroalkanesufinates with coumarin
作者:Jin-Tao Liu、Wei-Yuan Huang
DOI:10.1016/s0022-1139(99)00008-1
日期:1999.6
The reaction of sodium perfluoroalkanesufinates with coumarin in the presence of Mn(OAc)(3). 2H(2)O was studied. Sodium perfluoroalkanesufinates, RFSO2Na [R-F=F(CF2)(6), 2a; F(CF2)(7), 2b; F(CF2)(8), 2c; Cl(CF2)(4), 2d; Cl(CF2)(6), 2e],reacted readily with a small excess of coumarin to give the corresponding 3-perfluoroalkylated coumarins (3a-e), while poly-perfluoroalkylation of coumarin occurred when excess 2 was used in the reaction, and 3,6-diperfluoroalkylcoumarins (4) and 3,6,8-triperfluoroalkylcoumarins (5) were isolated as major products according to the ratio of starting materials. (C) 1999 Elsevier Science S.A. All rights reserved.