Toluene → HCID 18925402, compound

Participants

Reaction Steps

To 50 ml of toluene, 1 g of 2-bromo-3-nitrothiophene, 0.75 g of 4-chlorophenylboric acid, 5 ml of a 2M-aqueous potassium carbonate solution and 2 ml of ethanol were added and stirred at room temperature for 30 minutes in a nitrogen atmosphere. Successively 0.28 g of Pd(PPh3)4 was added and heat-refluxed for 2 hours. The aqueous layer was separated from the reaction mixture and the organic layer was washed with water and dried over anhydrous sodium sulfate. The solvent was distilled off under reduced pressure and the residue thus obtained was purified by silica gel column chromatography to obtain 1.1 g of the product as a yellow crystal. The yield was 98%. 1H-NMR(CDCl3, δ value):7.29(1H, d, J=5.9), 7.43(4H, s), 7.66(1H, d, J=5.9)

Provenance & Evidence