公开(公告)号：DE4008694A1

公开(公告)日：1991-09-19

申请号：DE4008694

申请日：1990-03-17

Applicant: BASF AG

Inventor： HUELLMANN MICHAEL DR ,  MAYR HERBERT PROF DR ,  BECKER RAINER DR

IPC: B01J31/26 ,  C07B61/00 ,  C07C2/00 ,  C07C2/72 ,  C07C13/48

Abstract: A process for preparing 1,1,3,4,4,6-hexamethyl-1,2,3,4-tetrahydronaphthalene of the formula I (I) comprises reacting p-cymene of the formula II (II) with a hexene of the formula IIIa, IIIb and/or IIIc (IIIa) (IIIb) (IIIc) in the presence of a catalytic amount of aluminum halide and a catalytic amount of a triphenylmethyl compound of the formula IV (IV) wherein R1, R2 and R3 are each, independently of one another, hydrogen, C1-C4-alkyl, nitro or halogen and X is hydrogen or halogen.