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2004
Imidazole derivatives
R 0190
Aminoimidazoliumcarboxamide with Dimethylformamide-dimethylacetal:
Novel ANRORC Towards Rearranged Imidazole Anchored with One-Carbon
45- 141 A
Fragment. — Aminoimidazoliumcarboxamides (I) react with DMF-DMA (II) to
afford substituted 4-amino-1-methylimidazole-5-carboxamides (III) via a ring opening-ring closure sequence. The benzyl derivative (IIIa) can be cyclized to the corresponding purinone (IVa) whereas derivatives (IIIb-e) don't react probably due to their
insolubility. — (CHATTOPADHYAY*, G.; SAHA, T. K.; Indian J. Chem., Sect. B:
Org. Chem. Incl. Med. Chem. 43 (2004) 7, 1558-1560; Dep. Chem., Pres. Coll.,
Calcutta 700 073, India; Eng.) — R. Langenstrassen
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