Formaldehyde → 3-Phenylsalicylic acid toluene-formaldehyde

Beteiligte Stoffe

Reaktionsschritte

To a mixture of 21.4 parts of 3-phenylsalicylic acid, 18.4 parts of toluene, 3.8 parts of 87% paraformaldehyde and 30 parts of acetic acid was added 2.0 parts of 95% sulfuric acid (catalyst). After being heated under reflux for 4 hours, the reaction mixture was washed with water, and unreacted toluene and water were removed by vacuum distillation to give 32 parts of 3-phenylsalicylic acid-toluene-formaldehyde co-condensation product. 10 parts of the co-condensation product was converted into its zinc salt in a similar manner as in Synthesis Example 4. There was obtained 10.8 parts of zinc salt of 3-phenylsalicylic acid-toluene-formaldehyde co-condensation product.

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