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Synthesis ofN-unsubstituted 2-arylpyrazolo[1,5-a]benzimidazoles from 1-benzylideneamino-2-methylbenzimidazole and the role of acylotropic and acylotropic-prototropic isomerization

✍ Scribed by T. A. Kuz’menko; L. N. Divaeva; A. S. Morkovnik

Book ID
106521929
Publisher
Springer
Year
2011
Tongue
English
Weight
504 KB
Volume
60
Category
Article
ISSN
1573-9171

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## Abstract magnified image The syntheses of 2‐amino‐__s__‐triazino[1,2‐__a__]benzimidazoles from 2‐guanidinobenzimidazoles were successfully carried out by a ring annelation reaction. The regiochemistry of the ring closure of 5‐methyl‐2‐guanidinobenzimidazole with diethyl azodicarboxylate, aldehy