Reaktion #1715058

Reaktionsgleichung

methyl [2-methyl-4-(4-ethylphenyl)-5,6,7,8-tetrahydro[1]benzothieno[2,3-b]pyridin-3-yl]pentanoate

sodium hydroxide

→

title compound

Ausbeute 48.2%

2-[2-Methyl-4-(4-ethylphenyl)-5,6,7,8-tetrahydro[1]benzothieno[2,3-b]pyridin-3-yl]pentanoic acid

Ausbeute 48.2%

Lösungsmittel

methanol

Reaktionsbedingungen

Aufarbeitung

1. 1
   TemperaturAfter cooling
2. 2
   Einengenthe reaction mixture was concentrated under reduced pressure
3. 3
   workup.DISSOLUTIONThe residue was dissolved in ethyl acetate
4. 4
   WaschenThe organic layer was washed with brine, water
5. 5
   Trocknendried over magnesium sulphate
6. 6
   Einengenconcentrated under reduced pressure

Vorschrift

To a solution of methyl [2-methyl-4-(4-ethylphenyl)-5,6,7,8-tetrahydro[1]benzothieno[2,3-b]pyridin-3-yl]pentanoate (0.197 g; 0.468 mmol) in methanol (4.6 mL) was added a solution of sodium hydroxide 5 N (0.95 mL) and the mixture was heated at 60° C. for 18 h. After cooling, the reaction mixture was concentrated under reduced pressure. The residue was dissolved in ethyl acetate and the mixture was acidified with HCl (1N) until pH 1. The organic layer was washed with brine, water, dried over magnesium sulphate and concentrated under reduced pressure to furnish 0.092 g (48%) of the title compound as a white solid.

Quelle