반응 #161031

반응 방정식

N—[N-[(phenylmethoxy)carbonyl]-L-leucyl]-L-valinol

water

sodium carbonate

2-furancarbonyl chloride

→

title compound

수율 86.3%

N—[N-(2-Furanylcarbonyl)-L-leucyl]-L-valinol

수율 86.3%

용매

ethyl acetate

ethyl acetate

methanol

반응 조건

후처리

1. 1
   여과After the reaction solution was filtered
2. 2
   농축the filtrate was concentrated under reduced pressure
3. 3
   온도Under ice-cooling
4. 4
   기타was returned to room temperature
5. 5
   workup.STIRRINGwas stirred overnight
6. 6
   기타The aqueous layer of the reaction solution was separately collected
7. 7
   추출extracted with ethyl acetate
8. 8
   세척after it was washed with a 10% potassium hydrogensulfate
9. 9
   건조saturated brine, it was dried with anhydrous sodium sulfate
10. 10
    workup.DISTILLATIONThe solvent was distilled off under reduced pressure and ether
11. 11
    workup.ADDITIONwas added to the residue
12. 12
    세척to wash the crystal

실험 절차

30 mg of 10% palladium-carbon was added to a solution of 350 mg (1 mmol) of N—[N-[(phenylmethoxy)carbonyl]-L-leucyl]-L-valinol obtained in Reference Example 184 in 10 ml of methanol, and the mixture was stirred under a hydrogen atmosphere at room temperature overnight. After the reaction solution was filtered, the filtrate was concentrated under reduced pressure. 10 ml of ethyl acetate, 10 ml of water and further 159 mg (1.5 mmol) of sodium carbonate were added to the residue. Under ice-cooling, a solution of 131 mg (1 mmol) of 2-furancarbonyl chloride in 3 ml of ethyl acetate was added to the mixture solution. The reaction solution was returned to room temperature and was stirred overnight. The aqueous layer of the reaction solution was separately collected and extracted with ethyl acetate. The organic layer was combined and after it was washed with a 10% potassium hydrogensulfate and then saturated brine, it was dried with anhydrous sodium sulfate. The solvent was distilled off under reduced pressure and ether was added to the residue to wash the crystal to obtain 268 mg (86%) of the title compound.

출처