Originator
Fazol,Fournier,France,1979
Manufacturing Process
To a stirred and refluxing solution of 40 parts of benzene and 35 parts of
dimethylformamide (both solvents previously dried azeotropically) are added
successively 1.6 parts of sodium hydride and 7.7 parts of α-(2,4-
dichlorophenyl)imidazole-1-ethanol, (cooling on ice is necessary). After the
addition is complete, stirring and refluxing is continued for 30 minutes. Then
there are added 7.8 parts of 2.6-dichlorobenzyl chloride and the whole is
stirred at reflux for another 3 hours. The reaction mixture is poured onto
water and the product 1-[2,4-dichloro-b-(2,6-dichlorobenzyloxy)phenethyl]
imidazole, is extracted with benzene. The extract is washed twice with water,
dried, filtered and evaporated in vacuo. The base residue is dissolved in a
mixture of acetone and diisopropyl ether and to this solution is added an
excess of concentrated nitric acid solution. The precipitated nitrate salt is
filtered off and recrystallized from a mixture of methanol and diisopropyl
ether, yielding 1-[2,4-dichloro-b-(2,6-dichlorobenzyloxy)phenethyl]imidazole
nitrate; melting point 179°C.
