Bromoacetic Acid → 2-bromoacetic acid N-[2-(1-adamantyl)ethyl]-N-pentylamide

Temperature

-15 °C

Bromoacetic acid (0.50 g, 3.6 mmol) was dissolved in anhydrous tetrahydrofuran (20 ml), and the solution was stirred at −15° C. under a nitrogen atmosphere. N-Methylmorpholine (0.40 ml, 3.6 mmol) and isobutyl chlorocarbonate (0.45 ml, 3.5 mmol) were added to the solution. Then, a solution of a free base of 2-(1-adamantyl)-N-pentylethylamine hydrochloride (Intermediate No. 1-1) (1.0 g, 3.5 mmol) in anhydrous tetrahydrofuran (20 ml) was added dropwise to the mixture. The whole was stirred at 0° C. for 1.5 hours, a saturated aqueous sodium hydrogencarbonate solution (70 ml) and ethyl acetate (70 ml) were added to the reaction mixture, and the reaction mixture was distributed. The ethyl acetate layer was washed with water (70 ml) and a saturated aqueous sodium chloride solution (70 ml) successively and dried over anhydrous magnesium sulfate. The ethyl acetate layer was concentrated under reduced pressure to give 1.3 g quantitatively) of 2-bromoacetic acid N-[2-(1-adamantyl)ethyl]-N-pentylamide as a oily matter.

1. stirringThe whole was stirred at 0° C. for 1.5 hours
2. washThe ethyl acetate layer was washed with water (70 ml)
3. dry with materiala saturated aqueous sodium chloride solution (70 ml) successively and dried over anhydrous magnesium sulfate
4. concentrationThe ethyl acetate layer was concentrated under reduced pressure

ORD record

ord-ff872aaf1d4a4728ac6c2ba6a449382a

Source dataset

uspto-grants-2011_04

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07923461B2