It can be prepared in two different ways: 1) The reaction of 1-chloro-2,3-propylene oxide (I) with tert-butylamine (II) in ether yields 1-chloro-3-tert-butylamino-2-propanol (III), which is condensed with 2,3-xylenol (IV) by means of KOH in ether-water. 2) By heating a mixture of 1-tert-butyl-3-azetidinol (V) and 2,3-xylenol (IV) at 155 C with KOH.