| 摘要 |
<p>1488185 o-Benzyl toluenes BASF AG 21 Feb 1975 [22 Feb 1974 11 June 1974 18 June 1974 30 Nov 1974] 7303/75 Heading C5E [Also in Division C2] 2-Benzyltoluenes of the formula in which R<SP>1</SP> are independently H or halogen, R<SP>2</SP> are H, halogen, aliphatic or aromatic, are prepared by reaction of an o-xylyl halide (II) in which X is a halogen with an aromatic compound (III) either (a) in the presence of H 2 SO 4 using less than 7 moles of III per mole of II, or (b) in the presence of (1) a phosphoric acid and (2) an organic sulphonic acid, a zinc compound and/or a tin compound, or (c) in the presence of (1) H 2 SO 4 and (2) a phosphoric acid, an organic sulphonic acid, a boron compound, a zinc compound and/ or a tin compound examples describe the preparation of o-benzyl toluene; 2,3<SP>1</SP>,4<SP>1</SP>-trimethyl diphenylmethane; 2,2<SP>1</SP>,5<SP>1</SP>-trimethyl diphenylmethane; 2,4<SP>1</SP>-dimethyldiphenylmethane; and, 2-(methylbenzyl) -toluene.</p> |
