Selective trifluoromethylation and alkynylation of tetrahydroisoquinolines using visible light irradiation by Rose Bengal
作者:Weijun Fu、Wenbo Guo、Guanglong Zou、Chen Xu
DOI:10.1016/j.jfluchem.2012.05.009
日期:2012.8
convenient and efficient method for oxidative coupling of tetrahydroisoquinoline derivatives with trimethyl(trifluoromethyl)silane and terminalalkynes to 1-trifluoromethylated or 1-alkynylated tetrahydroisoquinolines via CH activation was developed using visible light irradiation. The protocol uses Rose Bengal as the catalyst, air as terminal oxidant, and the trifluoromethylation or alkynylation was selectively
Graphene oxide and Rose Bengal: oxidative C–H functionalisation of tertiary amines using visible light
作者:Yuanhang Pan、Shuai Wang、Choon Wee Kee、Emilie Dubuisson、Yuanyong Yang、Kian Ping Loh、Choon-Hong Tan
DOI:10.1039/c1gc15865a
日期:——
Visible light induced oxidative CâH functionalisation of tertiary amines catalysed by the combination of graphene oxide and Rose Bengal was developed. This reaction avoids the use of stoichiometric amounts of peroxy compounds as terminal oxidants. This reaction is useful for tri-alkyl amines including chiral tertiary amines. Both cyanide and trifluoromethyl nucleophiles were shown to participate in this reaction, providing α-cyano- and α-trifluoromethylated tertiary amines.
Copper-catalyzed oxidative trifluoromethylation of benzylic sp3 C–H bond adjacent to nitrogen in amines
作者:Hiromasa Mitsudera、Chao-Jun Li
DOI:10.1016/j.tetlet.2011.02.038
日期:2011.4
Copper-catalyzed trifluoromethylation via oxidative sp(3) C-H activation at the alpha-position of nitrogen in tetrahydroisoguinoline derivatives using DDQ and Ruppert-Prakash reagent has been successfully achieved. The reaction of various amines gave the corresponding trifluoromethylated products in 15-90% yields under mild conditions. (C) 2011 Elsevier Ltd. All rights reserved.