公开(公告)号：DE2527491A1

公开(公告)日：1976-12-30

申请号：DE2527491

申请日：1975-06-20

Applicant: BASF AG

Inventor： MERGER FRANZ DIPL CHEM DR ,  JACOBSEN THEODOR DIPL CHEM DR ,  EILINGSFELD HEINZ DIPL CHEM DR ,  MIESEN ERNEST DIPL ING ,  NESTLER GERHARD DIPL CHEM DR

IPC: C07C46/00 ,  C07C49/735 ,  C07C49/68

公开(公告)号：DE2547030A1

公开(公告)日：1977-05-05

申请号：DE2547030

申请日：1975-10-21

Applicant: BASF AG

Inventor： NESTLER GERHARD DIPL CHEM DR ,  PLATZ ROLF DIPL CHEM DR ,  MERGER FRANZ DIPL CHEM DR ,  BAUR KARL GERHARD DIPL CHEM DR ,  PATSCH MANFRED DIPL CHEM DR ,  JACOBSEN THEODOR DIPL CHEM DR

IPC: C07C2/86 ,  C07C17/26 ,  C07C25/18 ,  C07C15/16

Abstract: Prodn. of o-benzyltoluenes (I) of the formula A-B (in which A has the formula and B has the formula the R gps. are independently H or halogen and The R' gps. H, halogen or aliphatic or aromatic gps.) involves reacting o-xylyl halides (II) of the formula A-X (in which X is halogen) with benzenes (III) of the formula H-B in the presence of O-contg. cpds. (IV) of Al and Si. Reaction can be carried out (dis)continuously at 50-250 degrees C and press. up to 15 bar. It is pref. to operate without a solvent. (IV) pref. is an aluminosilicate with 1-95 mole Al2O3 per mole SiO2 and is used in amt. of 0.1-15 wt.% w.r.t. (II). (I) are valuable starting materials for the prodn. of anthracene, anthraquinone and their derivs. The process is simple and cheap, free from trouble and corrosion problems and gives (I) in good yields and purity, even at low reaction temps. Readily available starting materials are employed and no multistage syntheses are need for their prodn. The formation of sulphonation prods. is avoided and the protection of the environment is improved. In an example an o-benzylchlorotoluene isomer mixt. was obtd. in 87% yield from chloro-o-xylyl chlorides and benzene by heating 4 hrs. at 145 degrees C and 11 bar in the presence of Al silicate (10 wt.% Al2O3).