Water → benzyl (5S)-N,N-bis(tert-butoxycarbonyl)-5-(2,3-difluorophenyl)-6-nitro-D-norleucinate

HRID 133127

반응식

HRID 133127 반응식
[C:1]([O:5][C:6]([N:8]([C:27]([O:29][C:30]([CH3:33])([CH3:32])[CH3:31])=[O:28])[C@H:9]([CH2:20][CH2:21]/[CH:22]=[CH:23]/[N+:24]([O-:26])=[O:25])[C:10]([O:12][CH2:13][C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)=[O:11])=[O:7])([CH3:4])([CH3:3])[CH3:2].[F:34][C:35]1[C:40]([F:41])=[CH:39][CH:38]=[CH:37][C:36]=1B(O)O.O.C(=O)(O)[O-].[Na+].C1C=CC(P(C2C=CC3C(=CC=CC=3)C=2C2C3C(=CC=CC=3)C=CC=2P(C2C=CC=CC=2)C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>O1CCOCC1>[C:1]([O:5][C:6]([N:8]([C:27]([O:29][C:30]([CH3:33])([CH3:32])[CH3:31])=[O:28])[C@@H:9]([C:10]([O:12][CH2:13][C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)=[O:11])[CH2:20][CH2:21][C@@H:22]([C:39]1[CH:38]=[CH:37][CH:36]=[C:35]([F:34])[C:40]=1[F:41])[CH2:23][N+:24]([O-:26])=[O:25])=[O:7])([CH3:4])([CH3:3])[CH3:2]

참가 물질

7

반응물 5

HCID 962WaterHCID 516892Sodium BicarbonateHCID 634876Binap, (A+-)-2회HCID 2734333(2,3-Difluorophenyl)boronic acidHCID 25034374benzyl (2R,5E)-2-[bis(tert-butoxycarbonyl)amino]-6-nitrohex-5-enoate

생성물 1

HCID 25034375benzyl (5S)-N,N-bis(tert-butoxycarbonyl)-5-(2,3-difluorophenyl)-6-nitro-D-norleucinate

시약·촉매·용매 1

HCID 312751,4-Dioxane용매

실험 절차

A solution of benzyl (2R,5E)-2-[bis(tert-butoxycarbonyl)amino]-6-nitrohex-5-enoate from Step B (34.0 g, 73.2 mmol), 2,3-difluorophenylboronic acid (28.9 g, 183 mmol) and water (4.62 mL, 256 mmol) in dioxane (240 mL) was degassed with argon for 15 min. To this solution was added sodium bicarbonate (3.08 g, 36.6 mmol), (S)-BINAP (1.28 g, 2.05 mmol) and acetylacetanotobis(ethylene)rhodium(I) (0.472 g, 1.83 mmol). The mixture was stirred at ambient temperature for 2 min then heated to 35° C. After 4 h, (S)-BINAP (255 mg, 0.41 mmol) and acetylacetanotobis(ethylene)rhodium(I) (94 mg, 0.36 mmol) were added. After an additional 2 h, the reaction was partitioned between CH2Cl2 and aqueous NaHCO3. The aqueous layer was extracted with another portion of CH2Cl2. The combined organic extracts were dried over MgSO4, filtered and concentrated in vacuo. The crude product was purified by silica gel chromatography, eluting with a gradient of hexane:EtOAc—95:5 to 40:60, to give the title compound. MS: m/z=379 (M-C10H15O4).

후처리

  1. temperaturethen heated to 35° C
  2. waitAfter 4 h
  3. waitAfter an additional 2 h
  4. customthe reaction was partitioned between CH2Cl2 and aqueous NaHCO3
  5. extractionThe aqueous layer was extracted with another portion of CH2Cl2
  6. dry with materialThe combined organic extracts were dried over MgSO4
  7. filtrationfiltered
  8. concentrationconcentrated in vacuo
  9. customThe crude product was purified by silica gel chromatography
  10. washeluting with a gradient of hexane

출처 및 근거

ORD 기록
ord-655db2625b2c42b2910333d659e0c125
출처 데이터셋
uspto-grants-2008_06
특허 번호
US07390798B2

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