Sulfuric Acid → 5-(Furan-2-yl)-1-methyl-1H-pyrazole-4-carboxamide

HRID 839250Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 839250
[O:1]1[CH:5]=[CH:4][CH:3]=[C:2]1[C:6]1[N:10]([CH3:11])[N:9]=[CH:8][C:7]=1[C:12]#[N:13].S(=O)(=O)(O)[OH:15].[OH-].[Na+]>>[O:1]1[CH:5]=[CH:4][CH:3]=[C:2]1[C:6]1[N:10]([CH3:11])[N:9]=[CH:8][C:7]=1[C:12]([NH2:13])=[O:15]

Komponenten

4

Versuchsvorschrift

Stir 1.1 g of 5-(2-furyl)-1-methylpyrazole-4-carbonitrile together with 7 ml of concentrated sulfuric acid for 24 hours at room temperature. Pour the resulting mixture onto ice and adjust its pH-value to 4 with caustic soda. Then extract it with methylene chloride and reduce the organic phase to dryness to obtain 5-(2-furyl)-1-methylpyrazole-4-carboxamide [m.p. 115.5° to 116° C (from ethanol)] with a yield of 91%.

Aufarbeitung

  1. additionPour the resulting mixture onto ice
  2. extractionThen extract it with methylene chloride

Quellen und Nachweise

ORD-Eintrag
ord-d2a7a5f2e2b6499a97ae3fbf10c23161
Quelldatensatz
uspto-grants-1978_06
Patentnummer
US04093812

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