تفاعل #1131657

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.STIRRINGThe mixture was stirred at this temperature for another one hour
2. 2
   درجة الحرارةto warm to room temperature
3. 3
   workup.STIRRINGwhile stirring
4. 4
   درجة الحرارةit was refluxed for 10 minutes
5. 5
   درجة الحرارةafter it had cooled 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 which 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 with 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 at this temperature for another one hour and 1 ml of ethyl acetate was then added. The mixture was then allowed to warm to room temperature while stirring, it was refluxed for 10 minutes and, after it had cooled to room temperature, 100 ml of water were 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 which 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