反应详情

To a stirred solution of 1-tert-butyl-5-chloro-1H-pyrazole-4-carboxylic acid (3.040 g; 15.0 mmol) in N,N-dimethylformamide/methylene chloride (1:4 ratio, 20 mL) at room temperature was added diisopropylethylamine (21.2 mL; 120.4 mmol). TSTU (5.420 g; 18.0 mmol) was then added. The resulting mixture was allowed to stir at room temp. for 2 hr and then 2-adamantylamine hydrochloride (2.844 g; 15.0 mmol) was added. The mixture was allowed to stir over the weekend at room temperature and then concentrated in vacuo. The residue was partitioned between ethyl acetate and water. The organic layer was washed with brine, dried over sodium sulfate, filtered and concentrated in vacuo. The resulting light yellow gum was triturated with diethyl ether to provide 1-tert-butyl-5-chloro-1H-pyrazole-4-carboxylic acid adamantan-2-ylamide (4.02 g, 80%) as a white powder.

1. stirringto stir over the weekend at room temperature
2. concentrationconcentrated in vacuo
3. customThe residue was partitioned between ethyl acetate and water
4. washThe organic layer was washed with brine
5. dry with materialdried over sodium sulfate
6. filtrationfiltered
7. concentrationconcentrated in vacuo
8. customThe resulting light yellow gum was triturated with diethyl ether