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Imidazo[1,2-a]tetrazole and tetrazolo[1,5-a]benzimidazole

โœ Scribed by E. Alcalde; R.M. Claramunt

Publisher
Elsevier Science
Year
1975
Tongue
French
Weight
116 KB
Volume
16
Category
Article
ISSN
0040-4039

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โœฆ Synopsis

Research into azapentalenes' hrs been extended to the 1,2,3,3a,6_penta-azapentalenes IIb andVb. The azidoazoles 11s and Va were prepared from I snd IV as indicated. IR and M spectra show that the neutral molecules II and V exist as expected2 only as the azides IIa and Va: v as 83 occurred for both compounds at 2200-2130 an-' in EBr, CHC13 and DMSO, and all ERR signals were attributable to the structures IIa (A2 system) and Va (AA'BB' system).

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Hydrazonoyl bromides 1a-c react with 5-amino-3phenyl-1H-pyrazole, 5-amino-1H-1,2,4-triazole, 2aminopyridine, 2-aminopyrimidine, and 2-aminobenzimidazole to afford the corresponding imidazo[1,2-b]pyrazoles 10, imidazo[1,2-b]-1,2,4-triazoles 11, imidazo[1,2-a]pyridines 16, imidazo[1,2-a]pyrimidines 17