Oxalyl chloride → 2-(4-pyridyl)-1H-benzimidazole-4-carbonyl chloride

HRID 1533799

Reaktionsgleichung

Reaktionsgleichung von HRID 1533799
[N:1]1[CH:6]=[CH:5][C:4]([C:7]2[NH:11][C:10]3[CH:12]=[CH:13][CH:14]=[C:15]([C:16]([OH:18])=O)[C:9]=3[N:8]=2)=[CH:3][CH:2]=1.C(Cl)(=O)C([Cl:22])=O>ClCCl.CN(C)C=O>[N:1]1[CH:6]=[CH:5][C:4]([C:7]2[NH:11][C:10]3[CH:12]=[CH:13][CH:14]=[C:15]([C:16]([Cl:22])=[O:18])[C:9]=3[N:8]=2)=[CH:3][CH:2]=1

Komponenten

5

Edukt 2

HCID 65578Oxalyl chlorideHCID 112071702-Pyridin-4-yl-3H-benzoimidazole-4-carboxylic acid

Produkt 1

HCID 183548532-(4-pyridyl)-1H-benzimidazole-4-carbonyl chloride

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 6228DimethylformamideKatalysatorHCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

To a solution of 2-(4-pyridyl)-1H-benzimidazole-4-carboxylic acid (155 mg) in dichloromethane (2 ml) was added oxalyl chloride (0.056 ml) and N,N-dimethylformamide (2 drops) and stirred at ambient temperature for 2 hours. The reaction mixture was concentrated in vacuo to give 2-(4-pyridyl)-1H-benzimidazole-4-carbonyl chloride. To a solution of 4-amino-3-methoxy-N-methyl-N-[4-methyl-2-[5-(4-methylpiperazin-1-yl)carbonylpent-1-yloxy]phenyl]benzamide (76.8 mg) and triethylamine (65 mg) in dichloromethane (5 ml) was added 2-(4-pyridyl)-1H-benzimidazole-4-carbonyl chloride in dichloromethane (2 ml) under ice bath cooling and stirred at ambient temperature for 6 hours. After the reaction mixture was concentrated in vacuo, the residue was diluted with chloroform and saturated sodium hydrogen carbonate aqueous solution. The organic layer was separated and washed with brine. The solution was dried over magnesium sulfate and concentrated in vacuo. The residue was purified by silica gel (Chromatorex, Fuji Silysia Chemical Ltd.) column chromatography (methanol:chloroform=1:49). To the purified product was added water and 1N hydrochloric acid (0.51 ml). The solution was lyophilized to give 3-methoxy-N-methyl-N-[4-methyl-2-[5-(4-methylpiperazin-1-yl)carbonylpent-1-yloxy]-phenyl]-4-[2-(4-pyridyl)-1H-benzimidazol-4-yl]carbonylamino-benzamide trihydrochloride (120 mg).

Aufarbeitung

  1. concentrationThe reaction mixture was concentrated in vacuo

Quellen und Nachweise

ORD-Eintrag
ord-ffc876fb64be4464aff08134a1597fab
Quelldatensatz
uspto-grants-2001_03
Patentnummer
US06207693B1

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