2,6-Di-tert-butyl-4-(chloromethyl)phenol → (3,5-Di-tert-butyl-4-hydroxy-benzyl)-cyclohexyl-phosphinic acid methyl ester

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Reaction Steps

A mixture of 10.47 grams (59 mmol) of dimethylcyclohexylphosphonite with 15.14 grams (59 mmol) of 3,5-di-tert-butyl-4-hydroxybenzyl chloride (CAS REG # 955-01-1) in 45 mL of toluene is refluxed for 2 hours and is cooled. The resultant precipitated crystals are collected by filtration, washed with toluene, then hexane and are dried under vacuum to obtain 11.5 grams (51% yield) of (3,5-di-tert-butyl-4-hydroxy-benzyl)-cyclohexyl-phosphinic acid methyl ester as a white solid mp 149-150° C.

Provenance & Evidence