反应详情

The starting material, {[2-acetoxy-5-methyl-α-(4-chlorophenyl)benzyliden]-amino}malonic acid diethyl ester (colorless crystals from heptane, melting point 82°-84° C.), can be prepared as described in Example 1 from 4'-chloro-2-hydroxy-5-methyl-benzophenone via 4'-chloro-2-hydroxy-5-methyl-benzophenone imine (orange crystals from ethanol, melting point 134°-136° C.).