Hydrochloric Acid → 2-(4-ethoxy-phenyl)-pyrazolo[1,5-b]pyridazine-3-carboxylic Acid

HRID 1280406Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1280406
C[O:2][C:3]([C:5]1[C:6]([C:14]2[CH:19]=[CH:18][C:17]([O:20][CH2:21][CH3:22])=[CH:16][CH:15]=2)=[N:7][N:8]2[C:13]=1[CH:12]=[CH:11][CH:10]=[N:9]2)=[O:4].[OH-].[Na+].Cl>C(O)C>[CH2:21]([O:20][C:17]1[CH:18]=[CH:19][C:14]([C:6]2[C:5]([C:3]([OH:4])=[O:2])=[C:13]3[N:8]([N:9]=[CH:10][CH:11]=[CH:12]3)[N:7]=2)=[CH:15][CH:16]=1)[CH3:22]

Komponenten

5

Versuchsvorschrift

A mixture of 2-(4-ethoxy-phenyl)-pyrazolo[1,5-b]pyridazine-3-carboxylic acid methyl ester (1.2 g), ethanol (10 ml) and 2N sodium hydroxide (10 ml) was heated to 800 for 1.5 h. The mixture was allowed to cool and acidified to pH 1 with 2N hydrochloric acid. The title compound was isolated by filtration as a brown solid (716 mg, 63%). MH+ 284.

Aufarbeitung

  1. temperaturewas heated to 800 for 1.5 h
  2. temperatureto cool

Quellen und Nachweise

ORD-Eintrag
ord-d51abc5001504f28b81093f4a08b3439
Quelldatensatz
uspto-grants-2002_09
Patentnummer
US06451794B1

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