Zincke–Suhl reaction

The classic example of this reaction is the conversion of p-cresol to a cyclohexadienone (with the aid of aluminium chloride as a catalyst and tetrachloromethane as a solvent).

During a series of tests, Newman found that utilization of carbon disulfide as a solvent was demonstrated to improve the yield.

This is an important reaction for artificially producing biologically relevant molecules including the A ring of steroids.

[9] Other products including dioxocins and polymers can form depending upon the location of the initial addition of carbon tetrachloride.

Above: Ortho-addition of tetrachloride to phenoxy aluminum chloride can produce 6,12-diphenyl-2,8-dimethyl-6,12-epoxy-6H, 12H-dibenzo[b,f][1,5] dioxocin, a high-melting, white polymer.