Preparation of 1,1,3,4,4,6-hexamethyl-1,2,3,4-tetra-hydronaphtha

Details Preparation of 1,1,3,4,4,6-hexamethyl-1,2,3,4-tetra-hydronaphtha Preparation of 1,1,3,4,4,6-hexamethyl-1,2,3,4-tetra-hydronaphtha

1991-03-13

1991-11-26

Davis, Curtis R.

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By ring formation from nonring moiety, e.g., aromatization,...

585410, C07C 500

Patent

active

050684795

ABSTRACT:
A process for preparing 1,1,3,4,4,6-hexamethyl-1,2,3,4-tetrahydronaphthalene of the formula I ##STR1## comprises reacting p-cymene of the formula II ##STR2## with a hexene of the formula IIIa, IIIb and/or IIIc ##STR3## in the presence of a catalytic amount of aluminum halide and a catalytic amount of a triphenylmethyl compound of the formula IV ##STR4## wherein R.sup.1, R.sup.2 and R.sup.3 are each, independently of one another, hydrogen, C.sub.1 -C.sub.4 -alkyl, nitro or halogen and X is hydrogen or halogen.

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