Reaktion #569809

Reaktionsgleichung

3-(4-propoxyphenyl)-4-(N-propyl-N-(2,2,2-trichloroethoxycarbonyl)amino)-4,5-dihydro-1H-pyrazole

4-trifluoromethylphenyl isocyanate

→

desired compound

N-(4-trifluoromethylphenyl)-3-(4-propoxyphenyl)-4-(N-propyl-N-(2,2,2-trichloroethoxycarbonyl)amino)-4,5-dihydro-1H-pyrazole-1-carboxamide

Lösungsmittel

ether

Reaktionsbedingungen

Aufarbeitung

1. 1
   Einengenthe mixture was concentrated in vacuo
2. 2
   workup.DISSOLUTIONdissolved in 200 ml of 50/50 diethyl ether/hexanes

Vorschrift

To an ether solution of 3-(4-propoxyphenyl)-4-(N-propyl-N-(2,2,2-trichloroethoxycarbonyl)amino)-4,5-dihydro-1H-pyrazole (Example 585e) (≤85 mmole) was added 12.7 g (68 mmole) of 4-trifluoromethylphenyl isocyanate. After stirring for 30 minutes, the mixture was concentrated in vacuo and dissolved in 200 ml of 50/50 diethyl ether/hexanes and cooled to -20° C. Crystals of the desired compound formed and were filtered yielding 23 g of the desired compound, mp 162°-163° C.

Quelle