反应详情

Triphenylphosphine (0.53 g) was added in small portions to a solution of (E)-hex-2-en-1-ol (0.20 g), 2-(4-hydroxyphenyl)-5-pentylthiophene (0.50 g), diethylazodicarboxylate (0.35 g) in dry tetrahydrofuran (15 cm3) at 0° C. under an atmosphere of nitrogen. The reaction mixture was stirred at room temperature overnight. The solvent was removed under reduced pressure and the crude product was purified by column chromatography on silica gel using a 4:1 petroleum (40-60° C.) ether/ethyl acetate mixture as eluent, followed by recrystallisation from ethanol to yield 0.10 g of 2-(4-[(E)-hex-2-enyloxy]phenyl)-5-pentylthiophene, K, 82° C., I.

1. customThe solvent was removed under reduced pressure
2. customthe crude product was purified by column chromatography on silica gel using a 4:1 petroleum (40-60° C.) ether/ethyl acetate mixture as eluent
3. customfollowed by recrystallisation from ethanol