Since its synthesis in 1945, tri-tert-butylcarbinoll has received little attention, despite widespread interest in steric effects on reactivity. We wish now to report the results of an investigation of the dehydration of this compound in a variety of media, undertaken as part of a continuing study on the reactivity of tertiary alcohols and the synthesis of encumbered olefin^.^-^ Treatment with hexamethylphosphorus triamide (HMPT) at 215-240" has ...