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Synthesis of 1(11)H-2,3,4,5-tetrahydro[1,3]diazepino[1,2-a]benzimidazole starting from benzimidazole-2-sulfonic acid. Intramolecular cyclization of 2-(δ-chlorobutylamino)benzimidazole

✍ Scribed by V. A. Anisimova; V. V. Kuz’menko; T. A. Kuz’menko; A. S. Morkovnik


Publisher
Springer
Year
2007
Tongue
English
Weight
469 KB
Volume
56
Category
Article
ISSN
1573-9171

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✍ V. P. Kruglenko; V. P. Gnidets; N. A. Klyuev; M. V. Povstyanoi 📂 Article 📅 1989 🏛 Springer US 🌐 English ⚖ 352 KB

UDC 547.873'785.5'735 f 724.07:543.51 2-[(8-Ethyl-, arylimino)phenethyl]-l,2,4-triazino[2,3-a]benzimidazoles were obtained by reaction of 2-aroylmethyl-l,2,4-triazino[2,3-a]benzimidazol-4H-3-ones with ethyl(aryl)amines or urea. By the action of phosphorus oxychloride, these benzimidazoles cyclize in