Water → HCID 131732703, compound

Temperature

70 °C

Under an inert atmosphere, 5.23 g Bisphenol A (BPA) (22.9 mmol) and 2.83 g potassium hydroxide (50.4 mmol) were dissolved in 50 mL dimethylacetamide. Stirring was started at 500 rpm and the contents were warmed to 70° C. After 30 minutes, 7.09 g 2-methylbenzyl chloride (50.4 mmol) dissolved in 50 mL dimethylacetamide was added to the reaction mixture. The mixture was then heated at 100° C. for 4 h until no 2-methylbenzyl chloride was noted in the GPC trace. During the course of the reaction, a white precipitate had formed. The reaction mixture was cooled to room temperature and then poured into a 1 L separatory funnel containing 200 mL deionized water. The aqueous layer immediately became opaque. The reaction flask was washed with 50 mL deionized water and this wash was added along with 150 mL toluene to the separatory funnel. The separatory funnel was shaken and the bilayer allowed to settle. The lower, aqueous layer appeared opaque while the upper, organic layer was clear and colorless. The organic layer was separated and the aqueous layer was washed 3 additional times with 100 mL toluene. The combined organic fractions were dried over 20 g magnesium sulfate and filtered into a 1 L round bottom flask. The solvent was removed from the filtered toluene solution on a rotary evaporator initially at room temperature then at 70° C. Following solvent removal, a viscous oil remained in the round bottom flask. This crude product was recrystallized at 0° C. from an acetone solution. The crystalline white solid that had formed was filtered on a 7.0 cm Büchner funnel using Whatman 540 filter paper. The crystals were pulverized into a powder and washed with cold acetone. The white powder was transferred to a 75° C. vacuum oven and dried for 24 h. For Bisphenol A bis(2-methylbenzyl) ether: 52% yield (5.2 g, 12 mmol); white powder; mp 117° C. 1H NMR (500.1 MHz, CD2Cl2, ppm, J=Hz): 7.40 (d, 7.2, 2H, Ph), 7.23 (m, 6H, Ph), 7.17 (m, 4H, Ph), 6.90 (m, 4H, Ph), 5.02 (s, 4H, -PhCH2O—), 2.37 (s, 6H, -PhCH3), 1.65 (s, 6H, —C(CH3)2).

1. additionwas added to the reaction mixture
2. customDuring the course of the reaction
3. customa white precipitate had formed
4. temperatureThe reaction mixture was cooled to room temperature
5. additionpoured into a 1 L separatory funnel
6. additioncontaining 200 mL
7. washThe reaction flask was washed with 50 mL
8. additionthis wash was added along with 150 mL toluene to the separatory funnel
9. stirringThe separatory funnel was shaken
10. customThe organic layer was separated
11. washthe aqueous layer was washed 3 additional times with 100 mL toluene
12. dry with materialThe combined organic fractions were dried over 20 g magnesium sulfate
13. filtrationfiltered into a 1 L round bottom flask
14. customThe solvent was removed from the filtered toluene solution on a rotary evaporator initially at room temperature
15. customat 70° C
16. customFollowing solvent removal
17. customThis crude product was recrystallized at 0° C. from an acetone solution
18. customThe crystalline white solid that had formed
19. filtrationwas filtered on a 7.0 cm Büchner funnel
20. filtrationfilter paper
21. washwashed with cold acetone
22. customwas transferred to a 75° C.
23. customdried for 24 h

ORD record

ord-076245a4821b444fb2f0e036769db00e

Source dataset

uspto-grants-2015_04

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09005315B2