Synthesis 2005(7): 1164-1168  
DOI: 10.1055/s-2005-861811
PAPER
© Georg Thieme Verlag Stuttgart · New York

Regioselective Synthesis of Pyrrolo[2,3-d]pyrimidine Derivatives by Amine Oxide Rearrangement

Krishna C. Majumdar*, Anindita Biswas, Partha P. Mukhopadhyay
Department of Chemistry, University of Kalyani, Kalyani 741 235,West Bengal, India
Fax: +91(33)25828282; e-Mail: kcm@klyuniv.ernet.in;
Weitere Informationen

Publikationsverlauf

Received 6 September 2004
Publikationsdatum:
29. März 2005 (online)

Abstract

Regioselective synthesis of biologically important pyrrolo[2,3-d]pyrimidine derivatives 4a-h in 75-82% yields are reported. The applied conditions of the less studied rearrangement are the oxidation of 6-N-(4-aryloxybut-2-yn-1-yl)-N-methyl(or ethyl)amino-1,3-dimethyluracils 3a-h with m-chloroperoxybenzoic acid at 0-5 °C for one hour and then stirring at room temperature for 10-12 hours. Compounds 3a-h are prepared by the reaction of 1,3-di­methyl-6-chlorouracil (1) with different (4-aryloxybut-2-yn-1-yl)-N-methylamines or (4-aryloxybut-2-yn-1-yl)-N-ethylamines 2 in refluxing ethanol for 12-14 hours.