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

HRID 133127

反応式

HRID 133127 の反応式
[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]

参加物

7

反応物 5

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

生成物 1

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

試薬・触媒・溶媒 1

HCID 312751,4-Dioxane溶媒

実験手順

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).

後処理

  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

出典と根拠

ORDレコード
ord-655db2625b2c42b2910333d659e0c125
出典データセット
uspto-grants-2008_06
特許番号
US07390798B2

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