Donor-acceptor cyclopropanes as ortho-quinone methide equivalents in formal (4 + 2)-cycloaddition to alkenes

A new type of donor-acceptor cyclopropane reactivity towards alkenes was revealed for 2-arylcyclopropane-1,1-diesters that contain an OH-group in the ortho-position of the aryl substituent. In this case, the initial cyclopropanes participate in formal (4 + 2)-cycloaddition as synthetic equivalents o...

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Veröffentlicht in:Organic & biomolecular chemistry 2018, Vol.16 (21), p.3897-3909
Hauptverfasser: Ivanov, Konstantin L, Bezzubov, Stanislav I, Melnikov, Mikhail Ya, Budynina, Ekaterina M
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Sprache:eng
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Zusammenfassung:A new type of donor-acceptor cyclopropane reactivity towards alkenes was revealed for 2-arylcyclopropane-1,1-diesters that contain an OH-group in the ortho-position of the aryl substituent. In this case, the initial cyclopropanes participate in formal (4 + 2)-cycloaddition as synthetic equivalents of ortho-quinone methides which are potential intermediates generated under mild conditions in the presence of a Lewis acid.
ISSN:1477-0520
1477-0539
DOI:10.1039/c8ob00377g