Synthesis 2008(18): 2977-2985  
DOI: 10.1055/s-2008-1067236
PAPER
© Georg Thieme Verlag Stuttgart ˙ New York

New α-Amido-α-aminonitrones As Building Blocks for Constructing ­Heterocyclic Systems

Bartosz Trzewik*, Dariusz Cież, Maciej Hodorowicz, Katarzyna Stadnicka
Faculty of Chemistry, Jagiellonian University, ul. Romana Ingardena 3, 30-060 Kraków, Poland
Fax: +48(12)6340515; e-Mail: trzewik@chemia.uj.edu.pl;
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Publikationsverlauf

Received 27 May 2008
Publikationsdatum:
22. August 2008 (online)

Abstract

New, stable α-amido-α-aminonitrones were obtained in good yields from 3-oxobutyric acid N-pyridin-2-ylamides and nitrosobenzene. The α-amido-α-aminonitrones were then used as new, versatile building blocks to obtaining various heterocycles with both bielectrophilic and binucleophilic reagents. With diiodomethane as reagent, 1,2,5-oxadiazine derivatives were formed, whereas reactions with aromatic 1,2-, 1,3- and 1,4-diamines yielded quinoxaline, quinazoline, perimidine, and dibenzo[d,f][1,3]diazepine derivatives, respectively.

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Details of the X-ray crystal structure analysis for compounds 6a and 8a have been deposited in the Cambridge Crystallographic Data Centre, CCDC Nos. 683408 and 644908, respectively. Copies of this information may be obtained free of charge from The Director, CCDC, 12 Union Road, Cambridge CB2 1EZ, UK [fax: +44(1223)336033;
e-mail: deposit@ccdc.cam.ac.uk].