تفاعل #2072174

معادلة التفاعل

ethyl acetate

2-methyl-3-(8-quinolyl)cyclopent-2-enone

tetrahydrofuran

phenyllithium

→

3-hydroxy-2-methyl-3-phenyl-1-(8-quinolyl)cyclopentene

المردود 57.9%

المذيبات

water

ظروف التفاعل

المعالجة

1. 1
   workup.ADDITIONwas then added
2. 2
   درجة الحرارةto warm to room temperature
3. 3
   workup.STIRRINGwhile stirring
4. 4
   درجة الحرارةrefluxed for 10 minutes
5. 5
   درجة الحرارةcooled to room temperature
6. 6
   أخرىThe aqueous phase was then separated off from the organic phase
7. 7
   استخلاصthe aqueous phase was extracted twice with diethyl ether
8. 8
   تجفيفdried over magnesium sulfate
9. 9
   ترشيحfiltered
10. 10
    workup.DISTILLATIONthe solvent was distilled off
11. 11
    workup.DISSOLUTIONThe residue was dissolved in 5 ml of toluene
12. 12
    أخرىThe precipitate formed
13. 13
    ترشيحwas filtered off
14. 14
    أخرىdried

الإجراء التجريبي

A mixture of 2.4 g (10.75 mmol) of 2-methyl-3-(8-quinolyl)cyclopent-2-enone and 100 ml of tetrahydrofuran was cooled to −90° C., and 7.2 ml of phenyllithium (1.8 M in cyclohexane/diethyl ether, 12.9 mmol) were subsequently added while stirring. The mixture was stirred for a further one hour at this temperature and 1 ml of ethyl acetate was then added. The mixture was then allowed to warm to room temperature while stirring, refluxed for 10 minutes, cooled to room temperature and 100 ml of water were then added. The aqueous phase was then separated off from the organic phase and the aqueous phase was extracted twice with diethyl ether. The organic phases were combined, dried over magnesium sulfate, filtered and the solvent was distilled off. The residue was dissolved in 5 ml of toluene and then admixed with 80 ml of hexane. The precipitate formed was filtered off and dried. This gave 1.874 g (6.22 mmol, 57.9% yield) of 3-hydroxy-2-methyl-3-phenyl-1-(8-quinolyl)cyclopentene.

المصدر