Ethanol → 3-[3-ethoxy-1-[4-[2-(2-furyl)-5-methyl-4-oxazolylmethoxy]-3-methoxybenzyl]-1H-pyrazol-4-yl]propionic acid

HRID 350178Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 350178
[CH2:1]([O:3][C:4]1[C:8]([CH2:9][CH2:10][C:11]([O:13]CC)=[O:12])=[CH:7][N:6]([CH2:16][C:17]2[CH:22]=[CH:21][C:20]([O:23][CH2:24][C:25]3[N:26]=[C:27]([C:31]4[O:32][CH:33]=[CH:34][CH:35]=4)[O:28][C:29]=3[CH3:30])=[C:19]([O:36][CH3:37])[CH:18]=2)[N:5]=1)[CH3:2].[OH-].[Na+].O1CCCC1.C(O)C>Cl>[CH2:1]([O:3][C:4]1[C:8]([CH2:9][CH2:10][C:11]([OH:13])=[O:12])=[CH:7][N:6]([CH2:16][C:17]2[CH:22]=[CH:21][C:20]([O:23][CH2:24][C:25]3[N:26]=[C:27]([C:31]4[O:32][CH:33]=[CH:34][CH:35]=4)[O:28][C:29]=3[CH3:30])=[C:19]([O:36][CH3:37])[CH:18]=2)[N:5]=1)[CH3:2]

Komponenten

6

Edukt 4

HCID 702EthanolHCID 8028TetrahydrofuranHCID 14798Sodium HydroxideHCID 23021932ethyl 3-[3-ethoxy-1-[4-[2-(2-furyl)-5-methyl-4-oxazolylmethoxy]-3-methoxybenzyl]-1H-pyrazol-4-yl]propionate

Produkt 1

HCID 694240113-[3-ethoxy-1-[4-[2-(2-furyl)-5-methyl-4-oxazolylmethoxy]-3-methoxybenzyl]-1H-pyrazol-4-yl]propionic acidAusbeute 96 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 313Hydrochloric AcidLösungsmittel

Versuchsvorschrift

A mixture of ethyl 3-[3-ethoxy-1-[4-[2-(2-furyl)-5-methyl-4-oxazolylmethoxy]-3-methoxybenzyl]-1H-pyrazol-4-yl]propionate (561 mg), 1 N aqueous sodium hydroxide solution (2.5 ml), tetrahydrofuran (5 ml), and ethanol (5 ml) was stirred at room temperature for two hours, diluted with 1 N hydrochloric acid (2.5 ml), and extracted with ethyl acetate. The ethyl acetate layer was washed with saturated aqueous sodium chloride solution, dried (MgSO4), and concentrated. The obtained colorless crystals were collected by filtration, and 3-[3-ethoxy-1-[4-[2-(2-furyl)-5-methyl-4-oxazolylmethoxy]-3-methoxybenzyl]-1H-pyrazol-4-yl]propionic acid (506 mg, yield: 96%) was obtained. This was recrystallized from ethanol-hexane. Melting point: 133–134° C.

Aufarbeitung

  1. extractionextracted with ethyl acetate
  2. washThe ethyl acetate layer was washed with saturated aqueous sodium chloride solution
  3. dry with materialdried (MgSO4)
  4. concentrationconcentrated
  5. filtrationThe obtained colorless crystals were collected by filtration

Quellen und Nachweise

ORD-Eintrag
ord-ce05a116fdbf46dbb744f8ed4e5c2092
Quelldatensatz
uspto-grants-2007_02
Patentnummer
US07179823B1

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