Ghosh, Debaki ; Biswas, Subhanip ; Ghosh, Koena ; Basak, Amit (2014) Garratt–Braverman cyclization on basic alumina: a green protocol with improved selectivity Tetrahedron Letters, 55 (29). pp. 3934-3937. ISSN 0040-4039
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Official URL: http://doi.org/10.1016/J.Tetlet.2014.05.033
Related URL: http://dx.doi.org/10.1016/J.Tetlet.2014.05.033
Abstract
A green protocol (compared to the existing methodology) for carrying out Garratt–Braverman cyclization has been developed. The method involves stirring a pre-absorbed bispropargyl sulfone/ether/sulfonamide over basic alumina. The reaction with sulfones was over within 10–15 min at room temperature whereas for the ether/sulfonamide the reaction took 6–8 h at 130 °C. The products, aryl naphthalene derivatives, are obtained by simple filtration through Celite, in excellent yields.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 129958 |
| Deposited On: | 05 Dec 2022 05:36 |
| Last Modified: | 05 Dec 2022 05:36 |
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