Tetrahydrofuran → HCID 57786364, Verbindung

HRID 1628973Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1628973
[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([C:24](OC)=[O:25])=[C:6]2[C:10]=1[N:9]=[C:8]1[N:11]([C:15]3[CH:20]=[CH:19][C:18]([O:21][CH3:22])=[CH:17][C:16]=3[Cl:23])[CH2:12][CH2:13][CH2:14][N:7]21.[CH:28]1([Mg]Br)[CH2:30][CH2:29]1.[Cl-].[NH4+].O1[CH2:39][CH2:38][CH2:37]C1>>[Cl:1][C:2]1[C:10]2[N:9]=[C:8]3[N:11]([C:15]4[CH:20]=[CH:19][C:18]([O:21][CH3:22])=[CH:17][C:16]=4[Cl:23])[CH2:12][CH2:13][CH2:14][N:7]3[C:6]=2[C:5]([C:24]([CH:37]2[CH2:38][CH2:39]2)([CH:28]2[CH2:30][CH2:29]2)[OH:25])=[CH:4][CH:3]=1

Komponenten

5

Edukt 4

HCID 8028Tetrahydrofuran2×HCID 25517Ammonium ChlorideHCID 57785965HCID 57785965, VerbindungHCID 178418630HCID 178418630, Verbindung

Produkt 1

HCID 57786364HCID 57786364, VerbindungAusbeute 52 %

Reaktionsbedingungen

Temperatur
50 °C

Versuchsvorschrift

To a solution of methyl 9-chloro-1-(2-chloro-4-methoxyphenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazole-6-carboxylate (100 mg, 0.246 mmol) in tetrahydrofuran (2.5 mL) was added a solution of cyclopropyl magnesium bromide in tetrahydrofuran (1.0 M, 1.5 mL, 1.5 mmol) at 0° C. The mixture was stirred at room temperature for 0.5 hr and at 50° C. for 1 hr. Aqueous ammonium chloride was added to the reaction mixture at room temperature and the mixture was extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous magnesium sulfate and concentrated in vacuo. The residue was purified by flash chromatography on silica gel eluting with a 30-70% ethyl acetate/n-hexane gradient mixture and recrystallization from ethyl acetate/n-hexane to give the title compound (58.6 mg, 0.128 mmol, 52%) as colorless crystals.

Aufarbeitung

  1. extractionthe mixture was extracted with ethyl acetate
  2. washThe organic layer was washed with brine
  3. dry with materialdried over anhydrous magnesium sulfate
  4. concentrationconcentrated in vacuo
  5. customThe residue was purified by flash chromatography on silica gel eluting with a 30-70% ethyl acetate/n-hexane gradient mixture and recrystallization from ethyl acetate/n-hexane

Quellen und Nachweise

ORD-Eintrag
ord-c49bfe450c0f47d2b8f232fd5bb56561
Quelldatensatz
uspto-grants-2014_07
Patentnummer
US08785460B2

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