3-AZIDOMETHYL-2,9-DIOXATRICYCLO[4,3,1,0.sup.3,7 ] DECANE DERIVATIVES ARE DISCLOSED WHICH EXHIBIT ANALGESIC, AS WELL AS ANTIPYRETIC AND ANTIPHLOGISTIC PROPERTIES, AND WHICH HAVE THE FORMULA (I) ##STR1## wherein: R.sub.1 represents alkyloxy or aralkyloxy;One of R.sub.2 and R.sub.3 is hydrogen and the other represents hydroxy, acyloxy or carbamyloxy, or R.sub.2 and R.sub.3 jointly represent oxygen; and,Y and y' each represent hydrogen or jointly form a bond,As well as pharmaceutical formulations thereof.By reducing the 3-azidomethyl compounds of formula (I), the corresponding 3-aminomethyl compounds are obtained which possess sedative properties and which are valuable intermediates for preparing 3-(mono- or dialkylaminomethyl)-2,9-dioxatricyclo[4,3,1,0.sup.3,7 ] decanes which exhibit sedative and soporific activities.