تفاعل #95404

معادلة التفاعل

hydrochloric acid

3-(9-methoxy-3-hydroxy-5,9-dimethyl-decanoyl)-4-butyrolactone

water

→

aimed compound

المردود 70.0%

3-[9-methoxy-5,9-dimethyl-2(E)decenoyl]-4-butyrolactone

المردود 70.0%

المذيبات

methanol

methanol

ظروف التفاعل

المعالجة

1. 1
   workup.DISTILLATIONThe solvent is distilled off in vacuo
2. 2
   غسيلthe etheral solution is washed with water
3. 3
   أخرىdried
4. 4
   workup.DISTILLATIONthe solvent is distilled off
5. 5
   أخرىThe residue is purified by chromatography (adsorbent
6. 6
   workup.ADDITIONKieselgel 60, solvent: a 10:0.1 mixture of benzene and methanol)

الإجراء التجريبي

1 ml of methanol saturated with hydrochloric acid is added to a solution of 2.1 g (0.007 moles) of 3-(9-methoxy-3-hydroxy-5,9-dimethyl-decanoyl)-4-butyrolactone in 15 ml of dry methanol, and the mixture is allowed to stand at room temperature for 12 hours. 2 ml of water are added to the mixture, and the mixture is stirred at room temperature for 5 hours. The solvent is distilled off in vacuo, the residue is taken up in ether, the etheral solution is washed with water, dried, and the solvent is distilled off. The residue is purified by chromatography (adsorbent: Kieselgel 60, solvent: a 10:0.1 mixture of benzene and methanol). 1.4 g (70%) of the aimed compound are obtained; Rf =0.75 (developed with a 10:0.1 mixture of benzene and methanol).

المصدر