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7663336 
Journal Article 
Tetrazole formation during Bamford-Stevens reactions of diphenaldehyde bis-tosylhydrazone 
Banciu, MD; Banciu, A; Draghici, C; Petride, A; Chiraleu, F; , 
1995 
1 
Revue Roumaine de Chimie
ISSN: 0035-3930 
EDITURA ACADEMIEI ROMANE 
BUCHAREST 
1165-1173 
WOS:A1995UK52900009 
The Bamford-Stevens reaction of diphenaldehyde bis-tosylhydrazone (4), examined in five different procedures, afforded phenanthrene as main reaction product. 5H-6-Azadibenzo [a, c]tetrazolo [e]cycloheptene (6) was obtained as by-product (32 %) in aprotic basic reaction conditions. The reaction mechanisms are discussed. Formation of a tetrazole during Bamford-Stevens reaction of a bis-tosylhydrazone seems to be observed for the first time.