Hydrochloric Acid → 2-Phenylthiophene

Participants

Reaction Conditions

Reaction Steps

Under a nitrogen atmosphere, a mixture of 0.7 gram (catalyst) of bis(1,3-diphenylphosphino)propanenickel (II) chloride in 200 mL of dry diethyl ether was stirred, and 40 grams (0.245 mole) of 2-bromothiophene was added. The mixture was cooled to 0° C., and 113 mL (0.328 mole) of phenylmagnesium bromide (3M in diethyl ether) was added during a 20 minute period. Upon completion of addition, the reaction mixture was allowed to warm to ambient temperature and then was heated under reflux for 16 hours. The reaction mixture was poured with shaking into 500 mL of an aqueous 10% hydrochloric acid solution. The organic layer was separated and washed with distilled water. The organic layer was dried with magnesium sulfate and filtered. The filtrate was concentrated under reduced pressure to a residue. The residue was distilled under vacuum to yield 36 grams of 2-phenylthiophene; b.p. 140° C./3 mm, as a low melting solid.

Provenance & Evidence