ISOMERIZATION UNDER THE INFLUENCE OF p-TOLUENESULFONIC ACID.
The authors have investigated the influence of a mild acid isomerization catalyst, p-toluenesulfonic acid (TSA), on 4-butyl- (Ia) and 4-hexyl- (Ib) cyclohexanecarboxylic acids and their methyl esters (IIa, IIb). It is found that p-toluenesulfonic acid is an effective catalyst of cis-trans isomerization of 4-alkylcyclohexanecarboxylic acids and their esters; removal of water from the reaction medium raises the isomerization rate. Esters of alkylcyclohexanecarboxylic acids are isomerized at higher rates than the acids themselves. A probable mechanism of the acid-catalyzed isomerization reaction is proposed.
Kovshev,Karamysheva,Torgova,Geivandova,Roitman
p. 1069 - 1070
(2007/10/02)
LIQUID-PHASE CATALYTIC HYDROGENATION OF METHYL 4-n-BUTYLBENZOATE ON RANEY NICKEL
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Svidchenko, V. F.,Karamysheva, L. A.,Torgova, S. I.
p. 881 - 883
(2007/10/02)
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