4-Methylmorpholine → 2-((1R)-1-{2-[(Benzyloxy)amino]-2-oxoethyl}-4-cyclohexylbutyl)-N,N-dimethyl-1,3-oxazole-4-carboxamide

A solution of 2-((1R)-1-{2-[(benzyloxy)amino]-2-oxoethyl}-4-cyclohexylbutyl)-1,3-oxazole-4-carboxylic acid (Preparation 65) (200 mg, 0.48 mmol) in dichloromethane (6 ml) was treated sequentially with 1-hydroxybenzotriazole hydrate (72 mg, 0.53 mmol), dimethylamine hydrochloride (79 mg, 0.96 mmol), N-methylmorpholine (160 μl, 1.45 mmol) and 1-[3-(dimethylamino)propyl]-3-ethylcarbodiimide hydrochloride (111 mg, 0.58 mmol) and the resulting mixture was stirred at room temperature under a nitrogen atmosphere for 4 hours. The solvent was removed under reduced pressure and the residue was dissolved in ethyl acetate and washed sequentially with aqueous citric acid solution (10% w/v), a saturated aqueous solution of sodium hydrogen carbonate and brine, dried over anhydrous magnesium sulphate, filtered and the solvent removed under reduced pressure. The residue was then purified by column chromatography on silica gel eluting with dichloromethane:methanol:0.88 ammonia (95:5:0.5) to afford the title compound as a colourless oil (200 mg).

1. customThe solvent was removed under reduced pressure
2. dissolutionthe residue was dissolved in ethyl acetate
3. washwashed sequentially with aqueous citric acid solution (10% w/v)
4. dry with materiala saturated aqueous solution of sodium hydrogen carbonate and brine, dried over anhydrous magnesium sulphate
5. filtrationfiltered
6. customthe solvent removed under reduced pressure
7. customThe residue was then purified by column chromatography on silica gel eluting with dichloromethane

ORD 기록

ord-45858063c60d4320b59fde8cef729327

출처 데이터셋

uspto-grants-2005_05

DOI

10.6084/m9.figshare.5104873.v1

특허 번호

US06897306B2