Sodium triacetoxyborohydride → (R)-4-(4-((2-(tert-butyldimethylsilyloxy)ethyl)(ethyl)amino)-1-(phenylthio)butan-2-ylamino)-3-(trifluoromethylsulfonyl)benzenesulfonamide

HRID 1771196노트

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HRID 1771196 반응식
O=[CH:2][CH2:3][C@@H:4]([NH:13][C:14]1[CH:19]=[CH:18][C:17]([S:20]([NH2:23])(=[O:22])=[O:21])=[CH:16][C:15]=1[S:24]([C:27]([F:30])([F:29])[F:28])(=[O:26])=[O:25])[CH2:5][S:6][C:7]1[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=1.[Si:31]([O:38][CH2:39][CH2:40][NH:41][CH2:42][CH3:43])([C:34]([CH3:37])([CH3:36])[CH3:35])([CH3:33])[CH3:32].C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>ClCCCl>[Si:31]([O:38][CH2:39][CH2:40][N:41]([CH2:42][CH3:43])[CH2:2][CH2:3][C@@H:4]([NH:13][C:14]1[CH:19]=[CH:18][C:17]([S:20]([NH2:23])(=[O:22])=[O:21])=[CH:16][C:15]=1[S:24]([C:27]([F:29])([F:30])[F:28])(=[O:26])=[O:25])[CH2:5][S:6][C:7]1[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=1)([C:34]([CH3:37])([CH3:36])[CH3:35])([CH3:33])[CH3:32]

참가 물질

5

반응물 3

HCID 5049666Sodium triacetoxyborohydrideHCID 72666539[2-(tert-Butyldimethylsilanyloxy)ethyl]ethylamine2회HCID 86661872(R)-4-(4-oxo-1-(phenylthio)butan-2-ylamino)-3-(trifluoromethylsulfonyl)benzenesulfonamide2회

생성물 1

HCID 66723826(R)-4-(4-((2-(tert-butyldimethylsilyloxy)ethyl)(ethyl)amino)-1-(phenylthio)butan-2-ylamino)-3-(trifluoromethylsulfonyl)benzenesulfonamide수율 62%

시약·촉매·용매 1

HCID 111,2-Dichloroethane용매

실험 절차

To a solution of (R)-4-(4-oxo-1-(phenylthio)butan-2-ylamino)-3-(trifluoromethylsulfonyl)benzenesulfonamide (INTERMEDIATE 45, 3.98 g, 8.25 mmol) and 2-(tert-butyldimethylsilyloxy)-N-ethylethanamine (INTERMEDIATE 63, 1.68 g, 8.25 mmol) in 1,2-dichloroethane (27.5 ml) was added sodium triacetoxyborohydride (2.62 g, 12.37 mmol). The resulting mixture was stirred in the dark for 11.5 h and was then quenched with 0.5 M aqueous sodium hydroxide (50 ml). After vigorous stirring for 10 min, the opaque mixture became clear. The layers were diluted with ethyl acetate and then separated. The organic layer was washed with saturated aqueous sodium bicarbonate and saturated aqueous sodium chloride before being dried over sodium sulfate, filtered, and concentrated under reduced pressure. The resulting residue was purified by column chromatography (ISCO, 330 g SiO2, 50→100% ethyl acetate in hexanes for 20 mins then 0→20% methanol in ethyl acetate for 20 mins followed by 0→20% methanol in ethyl acetate over 20 min) to afford the title product (3.41 g, yield: 62%).

후처리

  1. customwas then quenched with 0.5 M aqueous sodium hydroxide (50 ml)
  2. stirringAfter vigorous stirring for 10 min
  3. additionThe layers were diluted with ethyl acetate
  4. customseparated
  5. washThe organic layer was washed with saturated aqueous sodium bicarbonate and saturated aqueous sodium chloride
  6. dry with materialbefore being dried over sodium sulfate
  7. filtrationfiltered
  8. concentrationconcentrated under reduced pressure
  9. customThe resulting residue was purified by column chromatography (ISCO, 330 g SiO2, 50→100% ethyl acetate in hexanes for 20 mins
  10. wait0→20% methanol in ethyl acetate for 20 mins followed by 0→20% methanol in ethyl acetate over 20 min

출처 및 근거

ORD 기록
ord-e6fc7cef71ad4d8094e26a7ac4cfc0df
출처 데이터셋
uspto-grants-2016_02
특허 번호
US09248140B2

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