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Methyl N-(triethylammoniosulfonyl)carbamate → tert-butyl 4-[(4S)-4-(methoxycarbonyl)-4,5-dihydro-1,3-oxazol-2-yl]-1H-indole-1-carboxylate

HRID 2389371
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인쇄 미리보기

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HRID 2389371 반응식
[OH:1][CH2:2][C@H:3]([NH:8][C:9]([C:11]1[CH:19]=[CH:18][CH:17]=[C:16]2[C:12]=1[CH:13]=[CH:14][N:15]2[C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])=O)[C:4]([O:6][CH3:7])=[O:5].CC[N+](S(N=C(OC)[O-])(=O)=O)(CC)CC>C1COCC1.CCOC(C)=O>[CH3:7][O:6][C:4]([C@@H:3]1[CH2:2][O:1][C:9]([C:11]2[CH:19]=[CH:18][CH:17]=[C:16]3[C:12]=2[CH:13]=[CH:14][N:15]3[C:20]([O:22][C:23]([CH3:25])([CH3:26])[CH3:24])=[O:21])=[N:8]1)=[O:5]
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참가 물질

5

반응물 2

HCID 2724994Methyl N-(triethylammoniosulfonyl)carbamateHCID 68536502tert-butyl 4-({[(1S)-1-(hydroxymethyl)-2-methoxy-2-oxoethyl]amino}carbonyl)-1H-indole-1-carboxylate

생성물 1

HCID 68535383tert-butyl 4-[(4S)-4-(methoxycarbonyl)-4,5-dihydro-1,3-oxazol-2-yl]-1H-indole-1-carboxylate수율 68%

시약·촉매·용매 2

HCID 8028Tetrahydrofuran용매
HCID 8857
Ethyl Acetate
용매

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온도
70 °C

실험 절차

To a solution of tert-butyl 4-({[(1S)-1-(hydroxymethyl)-2-methoxy-2-oxoethyl]amino}carbonyl)-1H-indole-1-carboxylate (2.09 g) in THF (21.0 mL) was added Burgess Reagent (1.44 g) at ambient temperature and the mixture was stirred at 70° C. for 45 minutes. The resulting mixture was diluted with EtOAc (60 mL) and washed successively with saturated NaHCO3 aqueous solution and brine. The organic layer was dried over anhydrous MgSO4, filtered and evaporated in vacuo. The residue was purified by silica gel column chromatography (n-hexane:EtOAc=2:1) to afford tert-butyl 4-[(4S)-4-(methoxycarbonyl)-4,5-dihydro-1,3-oxazol-2-yl]-1H-indole-1-carboxylate (1.35 g) as a colorless amorphous.

후처리

  1. washwashed successively with saturated NaHCO3 aqueous solution and brine
  2. dry with materialThe organic layer was dried over anhydrous MgSO4
  3. filtrationfiltered
  4. customevaporated in vacuo
  5. customThe residue was purified by silica gel column chromatography (n-hexane:EtOAc=2:1)

출처 및 근거

ORD 기록
ord-541ba14ba56642a286980a8b836473dd
출처 데이터셋
uspto-grants-2012_09
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US08273745B2

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