423775-08-0Relevant articles and documents
Compositions containing ionic liquids and their uses, in particular in organic synthesis
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Page/Page column 45; 46; 47; 50, (2016/10/17)
An ionic liquid is used as liquid matrix for organic synthesis in homogeneous phase on soluble support, the ionic liquid being presented in liquid or solid form at ambient temperature, of formula A1+X1?, A1+ representing a cation, functional or non-functional, or a mixture of cations in which either none of the cations is functional or at least one of the cations is functional, and X1? an anion, functional or non-functional, or a mixture of anions in which either none of the anions is functional or at least one of the anions is functional.
Rhodium(II)-catalyzed nondirected oxidative alkenylation of arenes: Arene loading at one equivalent
Vora, Harit U.,Silvestri, Anthony P.,Engelin, Casper J.,Yu, Jin-Quan
supporting information, p. 2683 - 2686 (2014/03/21)
A bimetallic RhII catalyst promoted the C-H alkenylation of simple arenes at 1.0 equivalent without the use of a directing group. A phosphine ligand as well as cooperative reoxidation of RhII with Cu(TFA)2 and V2O5 proved essential in providing monoalkenylated products in good yields and selectivities, especially with di- and trisubstituted arenes. Down to one: A C-H alkenylation of simple arenes without the need for an excess amount of the arene was possible with a bimetallic RhII catalyst (see scheme). A phosphine ligand as well as a combination of the oxidants Cu(TFA)2 and V2O5 proved essential for the efficient synthesis of monoalkenylated products with good selectivity, especially for di- and trisubstituted arene substrates.
Direct oxidative coupling of arenes with olefins by Rh-catalyzed C-H activation in air: Observation of a strong cooperation of the acid
Zheng, Lu,Wang, Jianhui
supporting information; experimental part, p. 9699 - 9704 (2012/09/21)
A [{RhCl(cod)}2]/CCl3COOH system was developed for the oxidative coupling of non-chelate-assisted arenes with olefins in the presence of catalytic amounts of Cu(OAc)2·H2O as a co-oxidant and oxygen as the terminal oxidant. The acid was an indispensable component in this system and played a very important role in the coupling reaction. This catalytic system was applied to the direct oxidative coupling of a series of arenes and olefins and the corresponding products were afforded in high yields with special chemo- and regioselectivity. This reaction provides an atom-efficient route to vinylarenes, which are widely used in various fine chemicals. Give it some air: A [{RhCl(cod)}2]/CCl3COOH system for the oxidative coupling of arenes and olefins afforded their corresponding products with special chemo- and regioselectivity in high yields. This reaction provides an atom-efficient route to vinylarenes. Copyright
