3-Buten-1-ol → 4-{4-[(1E)-4-hydroxybut-1-en-1-yl]-2-methylbenzyl}-5-(propan-2-yl)-1H-pyrazol-3-yl 2,3,4,6-tetra-O-acetyl-beta-D-glucopyranoside

HRID 1625936Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1625936
[CH2:1]([OH:5])[CH2:2][CH:3]=[CH2:4].[C:6]([O:9][C@@H:10]1[C@@H:33]([O:34][C:35](=[O:37])[CH3:36])[C@H:32]([O:38][C:39](=[O:41])[CH3:40])[C@@H:31]([CH2:42][O:43][C:44](=[O:46])[CH3:45])[O:30][C@H:11]1[O:12][C:13]1[C:17]([CH2:18][C:19]2[CH:24]=[CH:23][C:22](Br)=[CH:21][C:20]=2[CH3:26])=[C:16]([CH:27]([CH3:29])[CH3:28])[NH:15][N:14]=1)(=[O:8])[CH3:7].C1(C)C=CC=CC=1P(C1C=CC=CC=1C)C1C=CC=CC=1C>C(#N)C.C(N(CC)CC)C.C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[C:6]([O:9][C@@H:10]1[C@@H:33]([O:34][C:35](=[O:37])[CH3:36])[C@H:32]([O:38][C:39](=[O:41])[CH3:40])[C@@H:31]([CH2:42][O:43][C:44](=[O:46])[CH3:45])[O:30][C@H:11]1[O:12][C:13]1[C:17]([CH2:18][C:19]2[CH:24]=[CH:23][C:22](/[CH:4]=[CH:3]/[CH2:2][CH2:1][OH:5])=[CH:21][C:20]=2[CH3:26])=[C:16]([CH:27]([CH3:29])[CH3:28])[NH:15][N:14]=1)(=[O:8])[CH3:7]

Komponenten

7

Edukt 3

HCID 693893-Buten-1-olHCID 80271Tri-o-tolylphosphineHCID 685376803-(2,3,4,6-tetra-O-acetyl-beta-D-glucopyranosyloxy)-4-[(4-bromo-2-methyl-phenyl)methyl]-5-isopropyl-1H-pyrazole

Produkt 1

HCID 867151534-{4-[(1E)-4-hydroxybut-1-en-1-yl]-2-methylbenzyl}-5-(propan-2-yl)-1H-pyrazol-3-yl 2,3,4,6-tetra-O-acetyl-beta-D-glucopyranosideAusbeute 50,6 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 167845palladium(II) acetateKatalysatorHCID 6342AcetonitrileLösungsmittelHCID 8471TriethylamineLösungsmittel

Reaktionsbedingungen

Temperatur
90 °C

Versuchsvorschrift

Add 3-buten-1-ol (6.1 mL, 70 mmol) to a solution of 4-(4-bromo-2-methylbenzyl)-5-(propan-2-yl)-1H-pyrazol-3-yl 2,3,4,6-tetra-O-acetyl-beta-D-glucopyranoside (15 g, 23.5 mmol) in acetonitrile (200 mL) and triethylamine (50 mL). Degas the solution with nitrogen over 10 minutes. Add tri-o-tolylphosphine (1.43 g, 4.7 mmol) and palladium acetate (526 mg, 2.35 mmol). After refluxing at 90° C. for 2 hours, cool and concentrate to remove the solvent under reduced pressure. Purify the resulting residue by flash chromatography (silica gel, gradient ethyl acetate/hexanes from 20-80% over 20 min, 330 g column) to provide the title compound (7.5 g, 11.9 mmol). MS (m/z): 631.2 (M+1), 629.2 (M−1).

Aufarbeitung

  1. customDegas the solution with nitrogen over 10 minutes
  2. temperaturecool
  3. concentrationconcentrate
  4. customto remove the solvent under reduced pressure
  5. customPurify the resulting residue by flash chromatography (silica gel, gradient ethyl acetate/hexanes from 20-80% over 20 min, 330 g column)

Quellen und Nachweise

ORD-Eintrag
ord-a20fa3672e6146649b79c7b3eed5238c
Quelldatensatz
uspto-grants-2014_07
Patentnummer
US08785404B2

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