2,3,5-Trimethylphenol → 2,3,5-Trimethylphenyl isopropyl ether

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The 4-isopropoxy-2,3,6-trimethyl-benzyl-triphenyl-phosphonium chloride employed as the starting material is prepared by the procedure described in Example 18 by alkylation of 2,3,5-trimethylphenol to give 2,3,5-trimethylphenyl isopropyl ether (boiling point 115° C./11 mmHg), by haloformylation of the ether obtained to give 4-isopropoxy-2,3,6-trimethyl-benzyl chloride (nD20 =1.5433) and by reaction of the latter compound with triphenylphoshine.

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