[Al+3].[Cl-].[Cl-].[Cl-].[C:5]1([C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=2)[CH:10]=[CH:9][CH:8]=[CH:7][CH:6]=1.[Cl:17][C:18]1[N:26]=[CH:25][CH:24]=[CH:23][C:19]=1[C:20](Cl)=[O:21].O>C(=S)=S>[Cl:17][C:18]1[C:19]([C:20](=[O:21])[C:8]2[CH:9]=[CH:10][C:5]([C:11]3[CH:12]=[CH:13][CH:14]=[CH:15][CH:16]=3)=[CH:6][CH:7]=2)=[CH:23][CH:24]=[CH:25][N:26]=126.7 g AlCl3 is added slowly while stirring to a solution of 9.2 g biphenyl and 10.6 g 2-chloronicotinoyl chloride in 170 ml carbon disulfide. The mixture is refluxed 5 hrs. After cooling, the S2C layer is poured off, and the residue is added to acidic ice: water, basified and extracted with methylene chloride. The combined extracts are washed, dried (MgSO4) and solvent removed in vacuo. The crude product is chromatographed on a silicagel column and eluted with benzene:ethyl acetate 15:1. Yield: 5 g of title product, m.p. 128°-32° C.; UV (ethanol): λmax. 295 nm, ε: 27,260; Cl 11.96 (12.07).
Wird geladen…
