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Synthesis of Alkylidenecyclopentenones and Dialkylidenecyclopentenones via the Coupling of Propargylic Alcohol and 2-Alkyne-1,4-diol Derivatives with Cyclopropylcarbene–Chromium Complexes

✍ Scribed by James W Herndon; Jin Zhu; Diego Sampedro

Publisher
Elsevier Science
Year
2000
Tongue
French
Weight
162 KB
Volume
56
Category
Article
ISSN
0040-4020

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ChemInform Abstract: Synthesis of Alkyli
ChemInform Abstract: Synthesis of Alkylidenecyclopentenones and Dialkylidenecyclopentenones via the Coupling of Propargylic Alcohol and 2-Alkyne-1,4-diol Derivatives with Cyclopropylcarbene-Chromium Complexes.
✍ James W. Herndon; Jin Zhu; Diego Sampedro 📂 Article 📅 2000 🏛 John Wiley and Sons ⚖ 34 KB 👁 1 views

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ChemInform Abstract: Synthesis of Alkylidenecyclopentenones via the Coupling of Propargyl Alcohol Derivatives with Cyclopropylcarbene—Chromium Complexes.
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Effect of solvent polarity extremes on t
Effect of solvent polarity extremes on the coupling of cyclopropylcarbene-chromium complexes and alkynes: Synthesis of β-alkoxycyclopentadienones, 2-cyclopentene-1,3-diones, and cis 4,5-disubstituted cyclopentenones
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The reaction between acetylenes and cyclopropylcarbene-chromium complexes in hexane affords exclusively cyclopentadienone derivatives in good yield, which are readily hydrolyzed to cyclopentenediones. The analogous reaction in 50:50 water dioxane affords cis disubstituted cyclopentenones.

Comparative chemistry of μ-η1 : η2-allen
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