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1-Ferrocenylcyclopropene and 1-ferrocenylcyclopropyl cation
Dehydrobromination of cis and trans isomers of 1-bromo-2-ferrocenylcyclopropanes affords 1-ferrocenylcyclopropene. Its protonation with HBF4 results in 1-ferrocenylcyclopropylium tetrafluoroborate, which alkylates N,N-dimethylaniline in para position to yield 1-(p-dimethylaminophenyl)-1-ferrocenylcyclopropane. 1-Ferrocenylcyclopropene reacts with 1,3-diphenylisobenzofuran to give the classical [4+2]-cycloaddition product. Its structure as exo-2-ferrocenyl-1,5-diphenyl-6,7-benzo-8-oxatricyclo [3.2.1.02.4]oct-6-ene was established based on the data from X-ray diffraction analysis.
1-Ferrocenylcyclopropene and 1-ferrocenylcyclopropyl cation
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Reference£º
Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion