Cycloaddition Reactions of an Active Cyclic Phosphane/Borane Pair with Alkenes, Alkynes and Carbon Dioxide.
CHEMISTRY-A EUROPEAN JOURNAL(2020)
摘要
The active six-membered cyclo-FLP 6 undergoes a rapid P/B addition reaction to carbon dioxide. At elevated temperature, the resulting heterobicyclo[2.2.2]octane derived product 7 undergoes ring opening and equilibrates with the cyclotetramer (7)(4). In the large macrocyclic structure, four monomeric six-membered cyclo-FLP units are connected by four CO2 molecules to form the supramolecular ring system. The P/B cyclo-FLP 6 undergoes a variety of additional cycloaddition reactions.
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关键词
boron,cyclic frustrated Lewis pair,cycloaddition,phosphorus,rearrangement
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