[N+]([O-])(O)=O.Cl.[C:6]12([NH2:16])[CH2:15][CH:10]3[CH2:11][CH:12]([CH2:14][CH:8]([CH2:9]3)[CH2:7]1)[CH2:13]2.[OH-:17].[Na+]>S(=O)(=O)(O)O>[OH:17][C:8]12[CH2:9][CH:10]3[CH2:11][CH:12]([CH2:13][C:6]([NH2:16])([CH2:15]3)[CH2:7]1)[CH2:14]2To a mixture of 150 ml of concentrated sulfuric acid and 15 ml of concentrated nitric acid, cooled to 10° C. is added 10 g (0.053 moles) of 1-adamantanamine hydrochloride over 5 minutes. This mixture is stirred in an ice bath for 4 hours. The reaction is then poured over ice and the pH adjusted to pH 10 using 50% NaOH. The product is extracted into chloroform which is dried over MgSO4 and then evaporated to dryness. The residue is recrystallized from ethyl acetate to give 3-hydroxytricyclo[3.3.1.13,7 ]decan-1-amine (m.p. 260°-264° C.) which is used directly in step B.
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