Asymmetric bromine-lithium exchange: On the importance of both the diamine ligand and the organolithium reagent
The asymmetric bromine-lithium exchange on a series of prochiral biphenyls was investigated. As in many asymmetric organolithium reactions, the chiral ligand (here a diamine) was considered to be the enantiocontrolling element. We show here that the organ
Praz, Jézabel,Graff, Julien,Egger, Léo,Guénée, Laure,Wagschal, Simon,Kündig, E. Peter,Alexakis, Alexandre
supporting information
p. 16912 - 16915
(2015/11/27)
REACTIONS OF ORGANIC COMPOUNDS WITH SF4-HF-HALOGENATING AGENT SYSTEMS VI. REACTIONS OF BENZENE AND ITS DERIVATIVES WITH SF4-HF-Cl2(Br2)
In the reactions of benzene-carboxylic and -dicarboxylic acids with SF4-HF-Cl2(Br2), apart from the conversion of carboxyls into trifluoromethyl groups, there occurs the halogenation of the benzene ring with the formation of the corresponding chloro- and bromo-containing (trifluoromethyl)- and bis(trifluoromethyl)-benzenes.
Kunshenko, B. V.,Omarov, V. O.,Muratov, N. N.,Mikhailevskii, S. M.,Yagupol'skii, L. M.