2990
V. Singh et al. / Tetrahedron 64 (2008) 2979e2991
7.85 (m, 1H, ArH), 7.91 (s, 1H, NH); 13C NMR (75 MHz,
CDCl3) d¼13.8, 14.0, 19.0, 37.5, 42.5, 60.7, 62.4, 88.3,
107.4, 124.8, 128.2, 129.0, 132.3, 133.8, 145.7, 150.2,
152.3, 159.7, 165.2; mass (ESþ) m/z¼432.0 (Mþþ1, 100%).
Anal. Calcd for C20H21N3O8: C, 55.68; H, 4.91; N, 9.74.
Found: C, 55.85; H, 5.13; N, 9.55.
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Acknowledgements
Two of the authors (V.S. and G.P.Y.) acknowledge the
financial support CSIR, New Delhi in the form of fellowship.
This work was supported by a grant from DST, New Delhi.
Supplementary data
5. (a) Basavaiah, D.; Jaganmohan Rao, A.; Satyanarayana, T. Chem. Rev.
2003, 103, 811e890; (b) Basavaiah, D.; Rao, K. V.; Reddy, R. J. Chem.
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Chem., Int. Ed. 2007, 4614e4628.
Spectroscopic data of all compounds are provided. 1H NMR,
13C NMR, and mass spectra of several new compounds have
been included. Supplementary data associated with this article
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