Ammonia → 5-amino-3-ethyl-1-(2-octyl)-1H-pyrazole-4-carboxamide

Beteiligte Stoffe

Reaktionsschritte

5.21 g (34.66 mmol) of 2-(1-ethoxy-propylidene)-malononitrile and 5.00 g (34.66 mmol) of (1-methyl-heptyl)-hydrazine are refluxed for 4 hours in 40 ml of methanol. After the solvent has been removed in vacuo, 8.60 g of a red oil are obtained. The latter is dissolved in 250 ml of ethanol and, after 300 ml of concentrated NH3 solution (25% strength) and 70 ml of hydrogen peroxide solution (30%) have been added, the mixture is stirred for 48 hours at room temperature. After the non-aqueous solvents have been removed, the mixture is extracted three times with dichloromethane, and the organic phase is dried over sodium sulphate and evaporated on a rotary evaporator. This gives 7.45 g (71%) of a red solid.

Herkunft & Nachweise