Water → (5R)-2-(5-{3-[(1S)-2-Methoxy-1-methylethoxy]-5-[(triisopropylsilyl)oxy)phenyl]-1H-pyrrol-2-yl)-5{[(triisopropylsilyl)oxy]methyl}-4,5-dihydro-1,3-oxazole

HRID 909670Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 909670
O[C@H:2]([CH2:35][O:36][Si:37]([CH:44]([CH3:46])[CH3:45])([CH:41]([CH3:43])[CH3:42])[CH:38]([CH3:40])[CH3:39])[CH2:3][NH:4][C:5]([C:7]1[NH:8][C:9]([C:12]2[CH:17]=[C:16]([O:18][Si:19]([CH:26]([CH3:28])[CH3:27])([CH:23]([CH3:25])[CH3:24])[CH:20]([CH3:22])[CH3:21])[CH:15]=[C:14]([O:29][C@@H:30]([CH3:34])[CH2:31][O:32][CH3:33])[CH:13]=2)=[CH:10][CH:11]=1)=[O:6].CS(O)(=O)=O.C(N(CC)CC)C.O>O1CCCC1>[CH3:33][O:32][CH2:31][C@H:30]([CH3:34])[O:29][C:14]1[CH:13]=[C:12]([C:9]2[NH:8][C:7]([C:5]3[O:6][C@@H:2]([CH2:35][O:36][Si:37]([CH:38]([CH3:40])[CH3:39])([CH:44]([CH3:46])[CH3:45])[CH:41]([CH3:42])[CH3:43])[CH2:3][N:4]=3)=[CH:11][CH:10]=2)[CH:17]=[C:16]([O:18][Si:19]([CH:26]([CH3:27])[CH3:28])([CH:23]([CH3:25])[CH3:24])[CH:20]([CH3:22])[CH3:21])[CH:15]=1

Komponenten

6

Edukt 4

HCID 962WaterHCID 6395Methanesulfonic AcidHCID 8471TriethylamineHCID 66890970N-{(2S)-2-Hydroxy-3-[(triisopropylsilyl)oxy]propyl}-5-{3-[(1S)-2-methoxy-1-methylethoxy]-5-[(triisopropylsilyl)oxy]phenyl}-1H-pyrrole-2-carboxamide

Produkt 1

HCID 66682662(5R)-2-(5-{3-[(1S)-2-Methoxy-1-methylethoxy]-5-[(triisopropylsilyl)oxy)phenyl]-1H-pyrrol-2-yl)-5{[(triisopropylsilyl)oxy]methyl}-4,5-dihydro-1,3-oxazoleAusbeute 95 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

N-{(2S)-2-Hydroxy-3-[(triisopropylsilyl)oxy]propyl}-5-{3-[(1S)-2-methoxy-1-methylethoxy]-5-[(triisopropylsilyl)oxy]phenyl}-1H-pyrrole-2-carboxamide (10.54 g, 15.6 mmol) synthesized in Example (125e) was dissolved in tetrahydrofuran (160 mL), and anhydrous methanesulfonic acid (5.51 g, 31.6 mmol) and triethylamine (8.70 mL, 62.4 mmol) were added, followed by stirring at room temperature for 3 hours under nitrogen atmosphere, and subsequently the temperature was raised to 60° C., followed by stirring for 3 hours. To the reaction solution, water (200 mL) was added, and extraction was carried out with ethyl acetate (300 mL). The organic layer was washed with saturated brine, and subsequently dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure, and the resulting residue was purified using silica gel column chromatography (elution solvent: ethyl acetate/hexane=5%-30%) to afford the desired compound (9.72 g, yield 95%) as a brown oil.

Aufarbeitung

  1. temperaturesubsequently the temperature was raised to 60° C.
  2. stirringby stirring for 3 hours
  3. extractionextraction
  4. washThe organic layer was washed with saturated brine
  5. dry with materialsubsequently dried over anhydrous magnesium sulfate
  6. distillationThe solvent was distilled off under reduced pressure
  7. customthe resulting residue was purified
  8. washsilica gel column chromatography (elution solvent: ethyl acetate/hexane=5%-30%)

Quellen und Nachweise

ORD-Eintrag
ord-124a932080024460b6a6b53487b22b3c
Quelldatensatz
uspto-grants-2011_09
Patentnummer
US08017610B2

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