Kusanur, Raviraj A and Kulkarni, Manohar V and Kulkarni, Geetha M and Nayak, Susanta K and Row, Tayur N Guru and Ganesan, Kilivelu and Sun, Chung-Ming (2010) Unusual Anisotropic Effects from 1,3-Dipolar Cycloadducts of 4-Azidomethyl Coumarins. In: Journal of Heterocyclic Chemistry, 47 (1). pp. 91-97.
Full text not available from this repository. (Request a copy)Abstract
4-Bromomethylcoumarins (1) reacted with sodium azide in aqueous acetone to give 4-azidomethyl-coumarins (2), which underwent 1,3-dipolar cycloaddition with acetylenic dipolarophiles to give triazoles (3). These triazoles (3) have been found to exhibit interesting variations in the chemical shifts of C-3-H and C-4-methylene protons. Protonation studies indicate that the shielding effect of the C-3-H of coumarin is due to pi-electrons of the triazole ring, further supported by diffraction and computational studies.
| Item Type: | Journal Article |
|---|---|
| Publication: | Journal of Heterocyclic Chemistry |
| Publisher: | Journal of Heterocyclic Chemistry |
| Additional Information: | Copyright of this article belongs to Journal of Heterocyclic Chemistry. |
| Department/Centre: | Division of Chemical Sciences > Solid State & Structural Chemistry Unit |
| Date Deposited: | 08 Mar 2010 12:40 |
| Last Modified: | 08 Mar 2010 12:40 |
| URI: | http://eprints.iisc.ac.in/id/eprint/25902 |
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