Hydrochloric Acid → Phthalonitrile

Temperatur

90 °C

To a 2000 mL, three-necked flask fitted with a thermometer and a nitrogen inlet were added bisphenol AF (149 g, 0.442 mol), 1,6-dibromohexane (53.4 g, 0.219 mol), powdered anhydrous K2CO3 (150 g, 1.09 mol), and dimethylsulfoxide (DMSO) (1000 mL). The resulting mixture was degassed with nitrogen at ambient temperature and heated at 90° C. under a nitrogen atmosphere for 8-16 hr. The mixture was cooled to 50° C. At this time, 4-nitrophthalonitrile (80.1 g, 0.463 mol) was added in one portion and the reaction mixture was heated at 80° C. for 6-8 hr. The mixture was allowed to cool to ambient temperature and poured into 1000 mL of distilled water. The mixture was made acidic by the addition of 6 M aqueous HCl and the resin was extracted out of the water layer by toluene (200 mL). The toluene extracts were washed 3 times with 500 mL of distilled water and dried using magnesium sulfate. Removal of the toluene resulted in an amber oil, which was dried at 80° C. under vacuum. The 2:1 oligomeric phthalonitrile was isolated as an amber glassy solid (224 g, 97%). 1H-NMR [CDCl3]: λ 7.75 (m, aromatic-HR), 7.32 (m, aromatic-HR), 7.08 (m, aromatic-HR), 6.97 (m, aromatic-HR), 6.81 (m, aromatic-HR), 4.10 (m, aliphatic-HR), 1.80 (m, aliphatic-HR), 1.51 (m, aliphatic-HR).

1. customTo a 2000 mL, three-necked flask fitted with a thermometer and a nitrogen inlet
2. customThe resulting mixture was degassed with nitrogen at ambient temperature
3. temperatureThe mixture was cooled to 50° C
4. temperaturethe reaction mixture was heated at 80° C. for 6-8 hr
5. temperatureto cool to ambient temperature
6. extractionthe resin was extracted out of the water layer by toluene (200 mL)
7. washThe toluene extracts were washed 3 times with 500 mL of distilled water
8. customdried
9. customRemoval of the toluene
10. customresulted in an amber oil, which
11. customwas dried at 80° C. under vacuum

ORD-Eintrag

ord-f70db3ae88a84f0c9f7a3f90f41a9e9b

Quelldatensatz

uspto-grants-2016_07

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US09394404B2