تفاعل #2307972

معادلة التفاعل

Benzyl chloride

sodium hydroxide

NaOH

hexaethylene glycol

→

monodispersed compound 1

المردود 70.6%

Hexaethylene glycol monobenzyl ether

المردود 70.6%

المذيبات

brine

water

ظروف التفاعل

المعالجة

1. 1
   درجة الحرارةthe reaction mixture was heated
2. 2
   درجة الحرارةThe reaction mixture was then cooled
3. 3
   استخلاصextracted with methylene chloride (200 ml×2)
4. 4
   غسيلThe combined organic layers were washed with brine once
5. 5
   تجفيفdried over Na2SO4
6. 6
   ترشيحfiltered
7. 7
   تركيزconcentrated in vacuo to a dark brown oil
8. 8
   أخرىThe crude product mixture was purified via flash chromatography (silica gel, gradient elution: ethyl acetate to 9/1 ethyl acetate/methanol)

الإجراء التجريبي

An aqueous sodium hydroxide solution prepared by dissolving 3.99 g (100 mmol) NaOH in 4 ml water was added slowly to monodispersed hexaethylene glycol (28.175 g, 25 ml, 100 mmol). Benzyl chloride (3.9 g, 30.8. mmol, 3.54 ml) was added and the reaction mixture was heated with stirring to 100° C. for 18 hours. The reaction mixture was then cooled, diluted with brine (250 ml) and extracted with methylene chloride (200 ml×2). The combined organic layers were washed with brine once, dried over Na2SO4, filtered and concentrated in vacuo to a dark brown oil. The crude product mixture was purified via flash chromatography (silica gel, gradient elution: ethyl acetate to 9/1 ethyl acetate/methanol) to yield 8.099 g (70%) of monodispersed compound 1 as a yellow oil.

المصدر