반응 #308621

반응 방정식

(R)-7-[3-tert-Butoxycarbonylamino-4-(2,4,5-trifluoro-phenyl)-butyryl]-3-trifluoromethyl-5,6,7,8-tetrahydro-imidazo[1,5-a]pyrazine-1-carboxylic acid

(R)-7-[3-tert-butoxycarbonylamino-4-(2,4,5-trifluoro-phenyl)-butyryl]-3-trifluoromethyl-5,6,7,8-tetrahydro-imidazo[1,5-a]pyrazine-1-carboxylic acid

thiomorpholine-1,1-dioxide hydrochloride

triethylamine

→

(R)-[3-[1-(1,1-dioxo-thiomorpholine-4-carbonyl)-3-trifluoromethyl-5,6-dihydro-8H-imidazo[1,5-a]pyrazin-7-yl]-3-oxo-1-(2,4,5-trifluoro-benzyl)-propyl]-carbamic acid tert-butyl ester

수율 94.3%

용매

N,N-dimethylformamide

dichloromethane

반응 조건

후처리

1. 1
   기타The reaction mixture was reacted at room temperature overnight
2. 2
   농축The reaction mixture was concentrated under reduced pressure
3. 3
   기타The resulting residue was purified by silica gel column chromatography

실험 절차

(R)-7-[3-tert-Butoxycarbonylamino-4-(2,4,5-trifluoro-phenyl)-butyryl]-3-trifluoromethyl-5,6,7,8-tetrahydro-imidazo[1,5-a]pyrazine-1-carboxylic acid 2a (150 mg, 0.27 mmol), thiomorpholine-1,1-dioxide hydrochloride (73 mg, 0.54 mmol), bis(2-oxo-3-oxazolidinyl)phosphonic chloride (0.138 g, 0.54 mmol) and triethylamine (0.25 mL, 1.62 mmol) were dissolved in 8 mL of dichloromethane under stirring, and 4 mL of N,N-dimethylformamide was then added to the solution. The reaction mixture was reacted at room temperature overnight and monitored by thin layer chromatography until the disappearance of the starting materials. The reaction mixture was concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography to obtain the title compound (R)-[3-[1-(1,1-dioxo-thiomorpholine-4-carbonyl)-3-trifluoromethyl-5,6-dihydro-8H-imidazo[1,5-a]pyrazin-7-yl]-3-oxo-1-(2,4,5-trifluoro-benzyl)-propyl]-carbamic acid tert-butyl ester 6a (170 mg, yield 94%) as a white solid.

출처