Br[C:2]1[C:6]2[CH:7]=[C:8]([CH:11]=[O:12])[CH:9]=[CH:10][C:5]=2[O:4][CH:3]=1.C1C=CC(P(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.CCN(CC)CC.[CH2:39]([O:41][C:42](=[O:45])[CH:43]=[CH2:44])[CH3:40]>C(#N)C>[CH2:39]([O:41][C:42](=[O:45])[CH:43]=[CH:44][C:2]1[C:6]2[CH:7]=[C:8]([CH:11]=[O:12])[CH:9]=[CH:10][C:5]=2[O:4][CH:3]=1)[CH3:40]In a sealed tube 3-Bromo-1-benzofuran-5-carbaldehyde (500 mg, 2.22 mmol) was dissolved in 7 ml of ACN. To this solution was added PPh3 (1.16 g, 4.44 mmol), Pd(II)acetate (500 mg, 2.2 mmol), Et3N (073 mL, 5.55 mmol) and finally acrylic acid ethyl ester (2.41 ml, 22 mmol). The tube was sealed and the reaction was heated at 120° C. for one hour. The crude was filtered on celite to eliminate inorganic contaminations. The solvents were evaporated and the crude was purified by silicagel chromatography using cyclohexane-AcOEt 95-5 to 50-50. A pale yellow solid was obtained (400 mg, yield:42%).
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