6,6'-((1E,1'E)-((2,3-Dimethylbutane-2,3-diyl)bis(azanylylidene))bis(methanylylidene))bis(2,4-di-tert-butylphenol) (CAS# 351498-10-7) is a useful building block used in the preparation of cobalt catalysts for hydrochlorination of unactivated olefins, and in 11β hydroxysteroid dehydrogenase type 1 inhibitors.