Reaktion #47130

Reaktionsgleichung

p-toluic acid

p-toluic acid

oxygen

terephthalic acid

N-acetoxyphthalimide

→

4-carboxybenzaldehyde

Ausbeute 74.4%

Lösungsmittel

acetic acid

Reaktionsbedingungen

Vorschrift

In a 500-ml titanium autoclave, 15.36 g (0.113 mol) of p-toluic acid, 0.232 g (1.13 mmol) of N-acetoxyphthalimide, 0.112 g (0.45 mmol) of cobalt(II) acetate tetrahydrate, 0.277 g (1.13 mmol) of manganese(II) acetate tetrahydrate and 107 g of acetic acid were placed, the resulting mixture was stirred at 170° C. in an atmosphere of a mixture of oxygen and nitrogen gases (1:1) [4 MPa (gauge pressure)] for 1 hour and thereby yielded terephthalic acid in a yield of 74.4% with a conversion from p-toluic acid of 77.5%. A small amount of 4-carboxybenzaldehyde was by-produced.

Quelle