Cyclopropanone, 2,2-dimethyl cycloaddition reactions

Cyclopropanone ketals undergo a unique [2s + 2a] cycloaddition reaction with tetracyanoethylene (TCNE) ". In the case of cis- and trans-dimethyl 0,S ketals 151... 

While cyclopropanone has been shown to possess the closed structure by microwave spectroscopy, many of its reactions appear to proceed by way of the zwitterionic oxyallyl cation intermediate C. The addition of 2,2-dimethyl-cyclopropanone to furan is analogous to the [4 + 2]-cycloaddition just described, and yields a product consistent with this rationalization ... 

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See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ , ]

See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ , ]

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