Reacción #2195506

Ecuación de reacción

NaOH

dicyclopentadiene

vinylbenzyl chloride

2,4-dinitrophenol

hydrochloric acid

→

vinylbenzyl ether

Rendimiento 95.0%

Disolventes

toluene

methyl ethyl ketone

Condiciones de reacción

Tratamiento posterior

1. 1
   Otroequipped with a thermoregulator, stirrer
2. 2
   Temperaturacooling condenser
3. 3
   workup.ADDITIONwas added dropwise at 75° C. to the obtained solution over 20 minutes
4. 4
   OtroAfter the obtained reaction mixture
5. 5
   Temperaturawas cooled to room temperature
6. 6
   workup.ADDITIONwas added
7. 7
   Lavadothe organic layer was then washed three times with 300 g of distilled water
8. 8
   OtroAfter methyl ethyl ketone was removed under reduced pressure
9. 9
   Otrothe reaction product was precipitated in 300 ml of methanol
10. 10
    Otroto collect solid matter
11. 11
    Filtraciónthrough filtration, which
12. 12
    Otrowas then dried at 50° C. in a vacuum oven

Procedimiento

45 g (0.25 equivalent) of dicyclopentadiene skeleton phenolic resin, DPP-3H (special phenolic resin manufactured by Nippon Petrochemical Co., Ltd.), 38.1 g of vinylbenzyl chloride CMS-AM (m-/p-isomers: 50/50 wt % mixture) (purity of 91%, 0.25 mol), 2.4 g of tetra-n-butylammonium bromide, 0.038 g of 2,4-dinitrophenol and 200 g of methyl ethyl ketone were charged into a 1-liter four-necked flask equipped with a thermoregulator, stirrer, cooling condenser and dropping funnel and dissolved under agitation, and 40 g of a 50 wt % aqueous solution of NaOH (NaOH purity of 95%, 0.475 mol) was added dropwise at 75° C. to the obtained solution over 20 minutes and further stirred at 75° C. for 4 hours. After the obtained reaction mixture was cooled to room temperature, it was neutralized with 2N hydrochloric acid, 100 g of toluene was added, and the organic layer was then washed three times with 300 g of distilled water. After methyl ethyl ketone was removed under reduced pressure, the reaction product was precipitated in 300 ml of methanol to collect solid matter through filtration, which was then dried at 50° C. in a vacuum oven to obtain a vinylbenzyl ether compound at a yield of 95%. This is designated as compound 3.

Fuente