Formic Acid → HCID 15580719, Verbindung

Reaktionsgleichung

FC(F)(F)[C:3]([NH:5][C:6]1[CH2:10][CH:9]([C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=2)[N:8]([C:17]2[CH:22]=[CH:21][C:20]([F:23])=[CH:19][CH:18]=2)[N:7]=1)=[O:4].C(O)=O.ClC1C=C(N2CC(C)C(NC=O)=N2)C=CC=1Cl>O>[F:23][C:20]1[CH:19]=[CH:18][C:17]([N:8]2[CH:9]([C:11]3[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=3)[CH2:10][C:6]([NH:5][CH:3]=[O:4])=[N:7]2)=[CH:22][CH:21]=1

Komponenten

Versuchsvorschrift

A mixture of 5.0 g. of 3-amino-1-(p-fluorophenyl)-5-phenyl-2-pyrazoline (prepared as described in Example 43) and 85.0 ml. of a mixture of formic acid and acetic anhydride (Example 15) is allowed to remain at room temperature for 2 hours. The solvent is evaporated in vacuo to give an oil. Water is added to separate a solid. The solid is dissolved in dichloromethane and is columnized and recrystallized twice as described in Example 26 (A) to give 3.55 g. of the desired product as colorless crystals, m.p. 158.5°-160.5° C.