Tetramethoxypropane → Ethyl pyrazolo(1,5-a)pyrimidine-3-carboxylate

HRID 231521

Reaktionsgleichung

Reaktionsgleichung von HRID 231521
[NH2:1][C:2]1[NH:6][N:5]=[CH:4][C:3]=1[C:7]([O:9][CH2:10][CH3:11])=[O:8].CO[CH:14](OC)[CH2:15][CH:16](OC)OC>C(O)(=O)C>[N:5]1[N:6]2[CH:14]=[CH:15][CH:16]=[N:1][C:2]2=[C:3]([C:7]([O:9][CH2:10][CH3:11])=[O:8])[CH:4]=1

Komponenten

4

Versuchsvorschrift

A stirred mixture of 10.88 g of 5-amino-4-pyrazolecarboxylic acid, ethyl ester, 11.51 g of malonaldehyde bis(dimethyl acetal) and 100 ml of glacial acetic acid was heated at reflux for 16 hours, then worked up as described in Example 50 to give 7.8 g of pyrazolo[1,5-a]pyrimidine-3-carboxylic acid, ethyl ester.

Aufarbeitung

  1. temperaturewas heated
  2. temperatureat reflux for 16 hours

Quellen und Nachweise

ORD-Eintrag
ord-5f8b8cdbe5c44c21aa1db52de5971b43
Quelldatensatz
uspto-grants-1989_07
Patentnummer
US04847256

Verknüpfte Notizen

Wird geladen…