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Base-Catalyzed Intramolecular Condensation of Tokinolide B.

โœ Scribed by Beatriz Quiroz-Garcia; Liliana Hernandez; Ruben A. Toscano; Olov Sterner; Guillermo Delgado

Book ID
101944436
Publisher
John Wiley and Sons
Year
2003
Weight
80 KB
Volume
34
Category
Article
ISSN
0931-7597

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๐Ÿ“œ SIMILAR VOLUMES

Base-catalyzed intramolecular condensati
Base-catalyzed intramolecular condensation of tokinolide B
โœ Beatriz Quiroz-Garcฤฑฬa; Liliana Hernรกndez; Rubรฉn A. Toscano; Olov Sterner; Guill ๐Ÿ“‚ Article ๐Ÿ“… 2003 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 175 KB

The novel pentacyclic compound cyclotokinolide B was obtained from the natural phthalide tokinolide B under basic conditions, via the chemoselective g-enol lactone opening followed by a Michael addition of the generated carbanion to the enone and subsequent equilibration. This result confirms that s

Base-catalyzed intramolecular condensati
Base-catalyzed intramolecular condensations of diligustilide
โœ Marรญa Yolanda Rios; Guillermo Delgado; Georgina Espinosa-Pรฉrez ๐Ÿ“‚ Article ๐Ÿ“… 1998 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 227 KB

Treatment of diligustilide (I) with base afforded the pentacyclic compounds 2 -4 with novel carbon-carbon connectivities via lactone-ring opening, intramolecutar condensations and competitive equilibrations. This reaction provides a useful entry to modified dimeric phthalides.