Phosphorus tribromide → (E)-3-[3-(3-thienyl)phenyl]-2-propenyl bromide

Participants

Reaction Steps

1.0 g of the resulting ester compound was reduced in a customary manner with lithium aluminum hydride, and then brominated by phosphorus tribromide. 0.7 g of (E)-3-[3-(3-thienyl)phenyl]-2-propenyl bromide obtained thus was dissolved in 10 ml of dimethylformamide, and 0.6 g of potassium phthalimide was added. The mixture was stirred overnight at room temperature, and the solution was worked up in a customary manner to give (E)-N-[3-[3-(3-thienyl)phenyl]-2-propenyl] phthalimide. 0.7 g of the resulting phthalimide compound was dissolved in a mixture (3 ml) of tetrahydrofuran and ethanol (1:1), and 0.5 ml of hydrazine hydrate was added. The mixture was stirred at room temperature for 1 hour, and then worked up in a customary manner to give 0.42 g of the captioned compound.

Provenance & Evidence