Facile rearrangements of a vinylogous alpha-hydroxy-beta-dicarbonyl substrate involving an apparent oxirane C-C bond scission
| Authors | |
|---|---|
| Year of publication | 2015 |
| Type | Article in Periodical |
| Magazine / Source | Tetrahedron Letters |
| MU Faculty or unit | |
| Citation | |
| web | http://www.sciencedirect.com/science/article/pii/S0040403915300575 |
| Doi | http://dx.doi.org/10.1016/j.tetlet.2015.09.015 |
| Field | Organic chemistry |
| Keywords | Oxirane cleavage; Vinylogous rearrangement; Ring expansion; Ring contraction; Organic synthesis |
| Description | alpha-Hydroxy-beta-dicarbonyls are known to undergo base-induced rearrangement to alpha-acyloxy carbonyls by a mechanism believed to involve an oxirane C-C bond scission step. Herein, we report the first example of this process in a vinylogous system. An attempt to access the protected form of the putative oxirane intermediate revealed an additional rearrangement pathway that was available to the substrate. Oxirane C-C bond cleavage mechanisms were invoked to explain both isomerizations. (C) 2015 Elsevier Ltd. All rights reserved. |
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