Chemistry of hydrocarbon compounds – Aromatic compound synthesis – By ring formation from nonring moiety – e.g. – aromatization,...
Patent
1989-01-27
1989-10-31
Dixon, Jr., William R.
Chemistry of hydrocarbon compounds
Aromatic compound synthesis
By ring formation from nonring moiety, e.g., aromatization,...
585410, 585452, 585459, C07C 1200, C07C 1264, C07C 264
Patent
active
048779164
ABSTRACT:
A process is disclosed for the production of polyalkyl tetrahydronaphthalenes wherein a cyclialkylation reaction between an olefinic compound of the general formula ##STR1## where R.sup.4, R.sup.5, R.sup.6 and R.sup.7 are independently defined and each is a substituent which does not interfere substantially with a Friedel-Crafts reaction, and a substituted benzene compound is carried out in the presence of a hydride abstracting reagent, an alkyl halide or hydrogen halide, a Lewis acid, and, optionally, a phase transfer agent. In some embodiments, the subject process is specifically carried out in the absence of elemental iodine. The subject process, which may be practiced in an unhalogenated hydrocarbon solvent, produces the desired compounds in a surprisingly high yield, with a surprisingly high selectivity to the desired product, and at a relatively high rate of reaction, using better, more convenient or less expensive process methodology than many processes known heretofore.
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Dixon Jr. William R.
Saba J.
Sites Edward J.
Union Camp Corporation
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