C([CH:6]1[CH2:11][CH2:10][C:9]([C:12]2[CH:17]=[CH:16][CH:15]=[C:14]([F:18])[C:13]=2[F:19])=[CH:8][CH2:7]1)CCCC.ClC1C(=O)C(C#N)=C(C#N)C(=O)C=1Cl>C1(C)C=CC=CC=1>[F:19][C:13]1[C:14]([F:18])=[CH:15][CH:16]=[CH:17][C:12]=1[C:9]1[CH:8]=[CH:7][CH:6]=[CH:11][CH:10]=1To a mixture of 0.1 mol 4-pentyl-1-(2,3-difluorphenyl)-cyclohex-1-en and 500 ml toluene is added 0.22 mol 2,3-dichlor-5,6-dicyano-p-benzoquinone (DDQ) and refluxed for 2 h. After usual work-up 2',3'-difluorbiphenyl, bp: 125° C. at 0.5 mm Hg is obtained.
Wird geladen…