Kumar, Rahul ; Nair, Deepa ; Namboothiri, Irishi N.N. (2014) Reactions of vinyl sulfone with α-diazo-β-ketosulfone and Bestmann–Ohira reagent for the regioselective synthesis of highly functionalized pyrazoles Tetrahedron, 70 (9). pp. 1794-1799. ISSN 0040-4020
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Official URL: http://doi.org/10.1016/j.tet.2014.01.022
Related URL: http://dx.doi.org/10.1016/j.tet.2014.01.022
Abstract
The 1,3-dipolar cycloaddition of diazomethylsulfone anion, generated in situ from α-diazo-β-ketosulfone, with vinyl sulfone proceeds in a regioselective manner to provide sulfonylpyrazoles. Similar reaction of diazomethylphosphonate anion, derived from Bestmann-Ohira reagent, with vinyl sulfone leads to phosphonylpyrazoles. The sulfonyl group of vinyl sulfone undergoes chemoselective elimination in these reactions.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 121407 |
| Deposited On: | 15 Jul 2021 13:11 |
| Last Modified: | 15 Jul 2021 13:11 |
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