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[5 + 2] Pyrone−Alkene Cycloaddition Approach to Tetrahydrofurans. Expeditious Synthesis of (±)-Nemorensic Acid

✍ Scribed by Rodríguez, J. Ramón; Rumbo, Antonio; Castedo, Luis; Mascareñas, José L.

Book ID: 126438277
Publisher: American Chemical Society
Year: 1999
Tongue: English
Weight: 65 KB
Volume: 64
Category: Article
ISSN: 0022-3263
DOI: 10.1021/jo990233c

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Use of a Sulfinyl Tether to Control Diastereofacial Selectivity in (5C + 2C) Pyrone-Alkene Cycloadditions. -The incorporation of a sulfoxide group on the tether connecting an alkene to a 4-pyrone diminishes significantly the temperature needed for inducing their thermal (5C + 2C) cycloaddition comp