Diisopropylcarbodiimide → HCID 18923895, Verbindung

HRID 1290253

Reaktionsgleichung

Reaktionsgleichung von HRID 1290253
C([O:8][C:9]1[CH:10]=[C:11]2[C:15](=[CH:16][CH:17]=1)[NH:14][CH:13]=[C:12]2[CH2:18][CH2:19][C:20](O)=O)C1C=CC=CC=1.O.ON1C2C=CC=CC=2N=N1.C(N=C=NC(C)C)(C)C.Cl.[OH:44][C:45]1[CH:46]=[CH:47][C:48]2[O:53][CH2:52][CH:51]([CH2:54][NH2:55])[O:50][C:49]=2[CH:56]=1>CN(C=O)C>[OH:44][C:45]1[CH:46]=[CH:47][C:48]2[O:53][CH2:52][CH:51]([CH2:54][NH:55][CH2:20][CH2:19][CH2:18][C:12]3[C:11]4[C:15](=[CH:16][CH:17]=[C:9]([OH:8])[CH:10]=4)[NH:14][CH:13]=3)[O:50][C:49]=2[CH:56]=1

Komponenten

6

Edukt 4

HCID 12734DiisopropylcarbodiimideHCID 27960291-Hydroxybenzotriazole hydrateHCID 189238902,3-Dihydro-7-hydroxy-1,4-benzodioxin-2-methanamine hydrochlorideHCID 189238923-[5-(Benzyloxy)-3-indolyl]propanoic Acid

Produkt 1

HCID 18923895HCID 18923895, VerbindungAusbeute 90,3 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel2×

Versuchsvorschrift

5-Benzyloxyindole-3-propionic acid (1.5 g, 5.0 mmole), 1-hydroxybenzotriazole hydrate (0.8 g, 6.0 mmole) and 1,3-diisopropylcarbodiimide (1.9 ml, 12.0 mmole) were combined in 150 ml of DMF and stirred at room temperature for 2 hours under a nitrogen atmosphere. To this was added dropwise 7-hydroxy-2,3-dihydro-1,4-benzodioxin-2-methanamine hydrochloride (1.1 g, 5.0 mmole) in 50 ml of DMF and the mixture was further stirred for 48 hours. The solvent was removed and replaced with dichloromethane. The mixture was then washed with H2O. The separated organic layer was dried over anhydrous sodium sulfate, filtered and concentrated in vacuum. The residue was chromatographed on silica gel using ethyl acetate as eluant. Fractions containing product were concentrated and recrystallized from ethyl acetate to give 1.6 g (68%) of the desired product, (7-hydroxy-2,3-dihydro-benzo[1,4]dioxin-2-ylmethyl)-3-(5-hydroxy-1H-indol-3-yl)-propanamide, as a white solid.

Aufarbeitung

  1. stirringthe mixture was further stirred for 48 hours
  2. customThe solvent was removed
  3. washThe mixture was then washed with H2O
  4. dry with materialThe separated organic layer was dried over anhydrous sodium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated in vacuum
  7. customThe residue was chromatographed on silica gel
  8. additionFractions containing product
  9. concentrationwere concentrated
  10. customrecrystallized from ethyl acetate

Quellen und Nachweise

ORD-Eintrag
ord-8778b93efd1b4216936f3ad614e754e3
Quelldatensatz
uspto-grants-1998_05
Patentnummer
US05750724

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