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Synthesis and structures of substituted 5,6-dihydro-spiro(benz[4,5]imidazo[1,2-c]quinazoline-6,3′-indolin)-2′-ones

✍ Scribed by P. G. Morozov; S. V. Kurbatov; F. M. Dolgushin; M. Yu. Antipin; L. P. Olekhnovich

Publisher
Springer
Year
2004
Tongue
English
Weight
287 KB
Volume
53
Category
Article
ISSN
1573-9171

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✍ Jan M. Bakke; Hanna S. H. Gautun; Harald Svensen 📂 Article 📅 2003 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 66 KB

## Abstract A new synthetic route to 6‐substituted‐imidazo[4,5‐__c__]pyridin‐2‐ons from 4‐aminopyridine has been investigated. 4‐Aminopyridine protected as alkyl carbamates were nitrated with dinitrogen pentoxide to the corresponding methyl, __i__‐propyl and __t__‐butyl 3‐nitropyridin‐4‐yl carbamat