반응 #2348116

반응 방정식

1-(2,6,6-trimethylcyclohex-3-enyl)but-2-en-1-one

ethyl diisopropylamine

L-Cystein methyl ester hydrochloride

→

title compound

수율 82.0%

Methyl 2-(4-oxo-4-(2,6,6-trimethylcyclohex-3-enyl)butan-2-ylamino)-3-(4-oxo-4-(2,6,6-trimethylcyclohex-3-enyl)butan-2-ylthio)propanoate

수율 82.0%

용매

MeOH

반응 조건

후처리

1. 1
   온도to reflux during 28 h
2. 2
   기타The solvent is removed in vacuo
3. 3
   workup.DISSOLUTIONthe residue dissolved in methyl t-butyl ether
4. 4
   세척The solution is washed with dilute aq. NaCl
5. 5
   건조dried over MgSO4
6. 6
   농축concentrated
7. 7
   기타The residue is purified by chromatography on SiO2

실험 절차

A solution of 1-(2,6,6-trimethylcyclohex-3-enyl)but-2-en-1-one (19.28 g, 100 mmol, 2 equiv.), ethyl diisopropylamine (6.45 g, 50 mmol, 1 equiv.) and L-Cystein methyl ester hydrochloride (8.60 g, 50 mmol, 1 equiv.) in MeOH (120 ml) is heated to reflux during 28 h. The solvent is removed in vacuo and the residue dissolved in methyl t-butyl ether. The solution is washed with dilute aq. NaCl, dried over MgSO4 and concentrated. The residue is purified by chromatography on SiO2 to yield 21.3 g (82%) of the title compound as yellowish, viscous oil.

출처