Hydrochloric Acid → 2-Phenylthiophene

Temperature

0 °C

Under a nitrogen atmosphere, a mixture of 0.7 gram (catalyst) of bis(1,3-diphenylphosphine)propane-nickel(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 complete addition the reaction mixture was allowed to warm to room temperature and then was heated at reflux for 16 hours. The reaction mixture was poured into 500 mL of an aqueous 10% hydrochloric acid solution and shaken. The organic layer was separated from the mixture and washed with distilled water. The organic layer was dried over anhydrous magnesium sulfate and filtered. The filtrate was concentrated under reduced pressure to a residue. This residue was distilled under vacuum to yield 36 grams of 2-phenylthiophene, b.p. 140° C. 3 mm, which slowly solidified upon standing.

1. additionUpon complete addition the reaction mixture
2. temperatureto warm to room temperature
3. temperaturewas heated
4. temperatureat reflux for 16 hours
5. stirringshaken
6. customThe organic layer was separated from the mixture
7. washwashed with distilled water
8. dry with materialThe organic layer was dried over anhydrous magnesium sulfate
9. filtrationfiltered
10. concentrationThe filtrate was concentrated under reduced pressure to a residue
11. distillationThis residue was distilled under vacuum

ORD record

ord-5602e15bb4b640aaafb84dc14a2543f4

Source dataset

uspto-grants-1988_12

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04792567