Reaktion #11579

Reaktionsgleichung

sodium hydrogencarbonate

2-(1-adamantyl)-N-pentylethylamine hydrochloride

3-(t-Butoxycarbonylamino)propionic acid

N-methylmorpholine

isobutyl chlorocarbonate

→

3-(t-butoxycarbonylamino)propionic acid N-[2-(1-adamantyl)ethyl]-N-pentylamide

Ausbeute 85.2%

Lösungsmittel

ethyl acetate

tetrahydrofuran

tetrahydrofuran

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigeat −18° C
2. 2
   workup.STIRRINGThe whole was stirred at 0° C. for 1.5 hours
3. 3
   WaschenThe organic layer was washed with a 10% aqueous citric acid solution (100 ml), water (100 ml)
4. 4
   Trocknena saturated aqueous sodium chloride solution (100 ml) successively and dried over anhydrous magnesium sulfate
5. 5
   EinengenThe organic layer was concentrated under reduced pressure
6. 6
   Sonstigethe concentrate was purified by silica gel column chromatography

Vorschrift

3-(t-Butoxycarbonylamino)propionic acid (1.0 g, 5.3 mmol) was dissolved in anhydrous tetrahydrofuran (15 ml), and N-methylmorpholine (0.6 ml, 5.5 mmol) was added to the solution. The mixture was stirred at −15° C., and isobutyl chlorocarbonate (0.7 ml, 5.4 mmol) was added thereto. Then, a solution of a free base of 2-(1-adamantyl)-N-pentylethylamine hydrochloride (Intermediate No. 1-1) (1.5 g, 5.3 mmol) in anhydrous tetrahydrofuran (15 ml) was added thereto at −18° C. The whole was stirred at 0° C. for 1.5 hours, ethyl acetate (100 ml) and a saturated aqueous sodium hydrogencarbonate solution (100 ml) were added to the reaction mixture, and the reaction mixture was distributed. The organic layer was washed with a 10% aqueous citric acid solution (100 ml), water (100 ml) and a saturated aqueous sodium chloride solution (100 ml) successively and dried over anhydrous magnesium sulfate. The organic layer was concentrated under reduced pressure, and the concentrate was purified by silica gel column chromatography to give 1.9 g (85%) of 3-(t-butoxycarbonylamino)propionic acid N-[2-(1-adamantyl)ethyl]-N-pentylamide as an oily matter.

Quelle