Tetrazole skeleton

Tetrazole compounds are also good starting materials for the synthesis of energetic materials with substituted side-chains attached to the tetrazole skeleton. For... 

Tetrazole compounds are also good starting materials for the synthesis of energetic materials with substituted side-chains attached to the tetrazole skeleton. For example, tetrazole can be alkylated by reaction with l-chloro-2-nitro-2-azapropane and converted into various energetic compounds (Figs. 9.12 and 9.13). 

Ring closure to the 5//-tetrazolo[5,l-t][l,3]oxazine skeleton has been reported by Hoornaert and co-workers <1996T8813>. These authors treated variously substituted 2,4-dichloro[l,4]oxazin-2-ones 133 with sodium azide. The fused tetrazoles 135 obtained were formed via the formation of their azide valence bond isomer intermediate 134. A similar approach proved to be suitable for the benzologues of these compounds. Thus, the benzoxazinone compounds 136 gave the tricyclic ring-closed tetrazoles 137. Both reactions yielding 135 and 137 proceeded in high yields (80-90%). 

Dialkyl(alkyl-A/-1H-tetrazol-5-ylalkan(or benzenecarbox)imidato)-boron compounds of type 29 have been prepared from 5-aminotetrazole, nitriles, R CN, and trialkylboranes, R3B, by heating the stirred mixture (containing an excess of R CN) to 120°C [20, 21]. The derivatives are characterized by mass spectral, IR, and UV data. An X-ray structure analysis was performed on 29f. The bicyclic skeleton of this compound is almost planar with some distortion about the boron atom [20]. 

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