Photolysis of 1-azidoadamantane (1) in an aqueous NaCN-n-hexane two-phase system with Adogen 464 as a phase-transfer catalyst gave 3-cyano-4-azahomoadaantane (3), a hydrocyanation product of 4-azahomoadamant-3-ene (2). A1C13-catalyzed decomposition of 1 in the presence of trimethylsilyl cyanide also afforded 3. 3 gave the corresponding amino acid 6 and ita ester 7. 4-Azahomoadamantano [3, 4]-fused hydantoin, ...