تفاعل #438979

معادلة التفاعل

n-butyl lithium

2-(3,4,4-trifluoro-3-butenylthio)oxazole

bromomethyl methyl ether

ammonium chloride

→

5-methoxymethyl-2-(3,4,4-trifluoro-3-butenylthio)oxazole

المردود 13.2%

المذيبات

ether

ether

ظروف التفاعل

المعالجة

1. 1
   أخرىback to room temperature
2. 2
   workup.STIRRINGstirring for 1 hour
3. 3
   أخرىto separate it into an ether layer
4. 4
   استخلاصThe aqueous layer was further extracted with ether and together with the separated ether layer it
5. 5
   غسيلwas washed with a saturated sodium chloride water
6. 6
   تجفيفdried with anhydrous magnesium sulfate
7. 7
   workup.DISTILLATIONAfter the solvent was distilled off under reduced pressure
8. 8
   workup.ADDITIONthe residue was treated by column chromatography

الإجراء التجريبي

10.40 ml of n-butyl lithium (1.6 M n-hexane solution) were slowly added dropwise to a solution of 3.14 g of 2-(3,4,4-trifluoro-3-butenylthio)oxazole in 40 ml of ether at −70° C. After stirring for 1 hour, a solution of 2.06 g bromomethyl methyl ether in 10 ml ether was added dropwise. After bringing the mixture back to room temperature and stirring for 1 hour, 50 ml of saturated solution of ammonium chloride was added to separate it into an ether layer and an aqueous layer. The aqueous layer was further extracted with ether and together with the separated ether layer it was washed with a saturated sodium chloride water and dried with anhydrous magnesium sulfate. After the solvent was distilled off under reduced pressure, the residue was treated by column chromatography to obtain 0.5 g of 5-methoxymethyl-2-(3,4,4-trifluoro-3-butenylthio)oxazole (yield 13%). n20D=1.4705.

المصدر