During our investigation of furan compounds we studied the behaviour of the furan nucleus in an arylfuran system 1-3. The examination of electron transfer across 2-furyl heterocyclic systems required a study of preparation of these systems. The hitherto known syntheses of 5- (2-furyl) tetrazoles are usually laborious or the yields are low. Pinner and Car04 described a synthesis of 5-(2-furyl) tetrazole by treatment of 2-furylhydrazoimide with nitrous acid. ...