Triethylamine → 2-cyclopropyl-1H-thieno[3,4-d]imidazole

HRID 869591Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 869591
Cl.Cl.[NH2:3][C:4]1[C:8]([NH2:9])=[CH:7][S:6][CH:5]=1.C(N(CC)CC)C.Cl.[CH:18]1([C:21](=N)OCC)[CH2:20][CH2:19]1.C(=O)([O-])O.[Na+]>C(O)C>[CH:18]1([C:21]2[NH:3][C:4]3=[CH:5][S:6][CH:7]=[C:8]3[N:9]=2)[CH2:20][CH2:19]1

Komponenten

6

Edukt 4

HCID 8471TriethylamineHCID 516892Sodium BicarbonateHCID 127073423,4-Diaminothiophene dihydrochlorideHCID 20026660Ethyl cyclopropanecarboximidate hydrochloride

Produkt 1

HCID 867214422-cyclopropyl-1H-thieno[3,4-d]imidazoleAusbeute 32 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 702EthanolLösungsmittel

Versuchsvorschrift

[step 1] 3,4-Diaminothiophene dihydrochloride (300 mg, 1.60 mmol) was suspended in ethanol (12 mL), triethylamine (0.45 mL, 3.21 mmol) and ethyl cyclopropanecarboimidate monohydrochloride (WO200970485; 528 mg, 3.53 mmol) were added, and the mixture was stirred at room temperature for 70 hr. To the mixture was added saturated aqueous sodium hydrogen carbonate, and the mixture was extracted 3 times with chloroform. The combined organic layers were dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane/ethyl acetate=100/0 v/v-0/100 v/v) to give 2-cyclopropyl-1H-thieno[3,4-d]imidazole (84 mg, 32%).

Aufarbeitung

  1. extractionthe mixture was extracted 3 times with chloroform
  2. dry with materialThe combined organic layers were dried over anhydrous magnesium sulfate
  3. concentrationconcentrated under reduced pressure
  4. customThe residue was purified by silica gel column chromatography (hexane/ethyl acetate=100/0 v/v-0/100 v/v)

Quellen und Nachweise

ORD-Eintrag
ord-90f81ebdcfc24a548bc469c7010c0eb5
Quelldatensatz
uspto-grants-2015_03
Patentnummer
US08969345B2

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