Tandem transformations of cyclopentene α,α-dichlorocarboxamides into epoxy lactones induced by a γ-hydroxyl group; a short synthesis of the Corey epoxy lactone and its enantiomer
In: Tetrahedron Letters, Jg. 56 (2015-12-01), S. 6904-6907
Online
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Zugriff:
The stable iminolactone 6 was obtained by NBS induced bromocyclization of carboxamide 4. Under treatment of 6 with DBU a tandem recyclization transformation occurred resulting in the formation of epoxyiminolactone 7. Bromo(iodo)cyclization of 4 in aqueous organic medium followed by treatment with base gave epoxylactone 9. Under the optimized conditions, Corey epoxylactone 1 and its enantiomer ent-1 were obtained from diastereomeric carboxamides 4 and 5 in an overall yield of 40%.
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Tandem transformations of cyclopentene α,α-dichlorocarboxamides into epoxy lactones induced by a γ-hydroxyl group; a short synthesis of the Corey epoxy lactone and its enantiomer
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Autor/in / Beteiligte Person: | Valiullina, Zuleykha R. ; Miftakhov, Mansur S. ; Ivanova, Nadezhda A. ; Akhmet’yanova, V. A. |
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Zeitschrift: | Tetrahedron Letters, Jg. 56 (2015-12-01), S. 6904-6907 |
Veröffentlichung: | Elsevier BV, 2015 |
Medientyp: | unknown |
ISSN: | 0040-4039 (print) |
DOI: | 10.1016/j.tetlet.2015.10.106 |
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