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Spectroscopy
Volume 14, Issue 4, Pages 177-194
http://dx.doi.org/10.1155/2000/162973

2D 1H and 13C NMR studies of the adducts obtained by cyclostereoselective oligomerization of α,β‒unsaturated arylidenketones promoted by 6 amino‒1,3‒dimethyl uracil

E. Díaz,1 H. Barrios,1 A. Gúzman,1 D. Corona,1 R. Díaz,2 A. Fuentes,2 and C. K. Jankowski3

1Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria Coyoacán, 04510 Mexico D.F., Mexico
2Facultad de Química de la Universidad Autónoma del Estado de México, Paseo Colón y Tollocan, Toluca 50000 Toluca, E. de México, Mexico
3Département de Chimie et Biochimie, U. de Moncton, Moncton N.B., E1A 3E9, Canada

Copyright © 2000 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The reaction of the 6‒amino‒1,3‒dimethyl uracil with the arylidenketones 1–4, enabled us to obtain adducts whose structures result from nucleophilic attack and self condensation, yielding with monomeric, dimeric or trimeric derivatives obtained with moderate (40–50%) yields. The reaction was induced by the uracil derivative and the role of this reagent was that of a nucleophile and oligomerization promoter. The structures obtained in this study were mainly elucidated with 1D and 2D high resolution NMR experiments.