Toluene → HCID 54529216, compound

Participants

Reaction Conditions

Reaction Steps

60 ml of dry toluene and 2.9 g (25.5 mmol) of trifluoroacetic acid are added, under argon, to 6.24 g (17 mmol) of 2,4-di-tert-butyl-6-[dimethylamino-(3,4-dimethyl-phenyl)-methyl]-phenol(compound (201). Table 2), prepared according to Example 1a. The reaction mixture is then maintained at 110° C. for 6 hours. After colling to room temperature, the mixture is poured into 50 ml of water and extracted three times using ethyl acetate. The organic phases are combined, dried over sodium sulfate and concentrated using a vacuum rotary evaporator. Crystallisation of the residue from isopropanol yields 4.48 g (82%) of a mixture of 2,4-di-tert-butyl-6-(3,4-dimethyl-benzylidene)-cyclohexa-2,4-dienone (compound (301), Table 3) and the corresponding dimer (compound (401), Table 4), m.p. 214-217°C.

Provenance & Evidence