Acetonitrile → 2-(2-Fluoro-[1,1'-biphenyl]-4-yl)acetonitrile
Reaktionsgleichung
[F:1][C:2]1[CH:7]=[C:6]([CH2:8]Br)[CH:5]=[CH:4][C:3]=1[C:10]1[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=1.[C:16](#[N:18])C>>[F:1][C:2]1[CH:7]=[C:6]([CH2:8][C:16]#[N:18])[CH:5]=[CH:4][C:3]=1[C:10]1[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=1Komponenten
3
Versuchsvorschrift
The crude monobromide prepared in Example 4 was refluxed with 100 ml of EtOH and 6.9 g (0.14 mol) of NaCN for one hour. Most of the EtOH was then removed in a rotary evaporator at reduced pressure and the resulting residue was partitioned between H2O and Et2O. The Et2O phase was dried over MgSO4 and concentrated to leave 19.3 g of brown semi-solid material. Analysis of this material by NMR showed that it contained the acetonitrile and only trace amounts of the monobromide. The crude acetonitrile material was stirred all night in petroleum ether and then filtered. The product was collected as 13.2 g of brown solid that contained about 5% of the starting material according to GC analysis. Concentration of the petroleum ether solution gave 4.9 g of orange liquid that contained mostly the starting material and some of the product acetonitrile. The yield of the 95% pure acetonitrile based on unrecovered fluoride (3) was about 70-80%.