Nitro tetrazole

The most widespread method of introducing nitro group in aromatic compounds, i.e., electrophilic substitution, is mainly used for the preparation of nitrodiazoles and benzazoles. The accumulation of pyridine nitrogen atoms in the cycle reduces the electrophilic substitution ability of compounds. Therefore, some indirect methods of introducing the nitro group are employed for the synthesis of triazole and tetrazole nitro derivatives. 

Ref. [152] discusses the transformation of a dinucleoside pyrophosphate into a reactive azolide with an azole (e.g., 3-nitro-1,2,4-triazole or tetrazole). With quinoline-8-sulfonyl chloride the concomitantly formed phosphordiester can be converted back to the dinucleoside pyrophosphate (see scheme on the next page). 

See entry nitramine- metal complexes See other a-nitro compounds, tetrazoles... 

ArN-NCRNNHAr by M. Ragno S. Bruno who prepd various nitro derivs [Gazz Chimltal 76, 485—99(1946) and CA 41, 6542(1947)]. For instance, the compd PhN=NC(CN)= NNHPh may be called N,N -Diphenyl-C-cyano formazan or N, N7-Di phenyl-formazylcyanide. Some of the formazan or formazyl derivs give expl salts while others form tetrazoles or other ring compds Note C Metby I formazan is called Acetazidin or Azidin in Beil 2, 4, but the name azidin has been suggested for the radical NgC(—)=NH, which is entirely different... 

NOTE No higher nitro derivs of Diphenyl-tetrazole were found in the literature thru 1°66... 

Amino-1(p-nitrophenyl)-a-tetrazole, 5-Amino-l-(4-nitrophenyl)-lH-tetrazole or 1-(p-Nitro-phenyl)-5-aminotetrazole, H2N-C-N(C6H4 N02 )-N. 

Spectrophotometric studies of dissociation constants of tetrazoles, triazoles and nitro-guanidines)... 

Nitroanilino-a(or IH)-tetrazole or 5-(nitro-phenylaminof tetrazole, C,HeN6Oa, mw 206.17,... 

Hie majority of tetrazoles are crystn solids. There is considerable variation in thermal stability, viz. derivatives which melt above 150° do so with decompn, while 5-guanylaminotetrazole (Vol 7, G366-L) does not melt at -300°. In general, most of the tetrazoles are acids and often yield expl salts. The tetrazoles, in the main, can be looked upon as gas generators, useful where instantaneous or progressive pressure effects are required. They possess moderate brisance. However, their salts, which may detonate with extreme brisance, can be used as primary expls, as can 1- and 2-Methyl-5-Nitro Tetrazoles, which are delineated in this article History of Use ... 

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