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Beilstein J. Org. Chem. 2011, 7, 1713–1721, doi:10.3762/bjoc.7.201
Graphical Abstract
Scheme 1: Valence isomerization of cyclohepta-1,3,5-triene (1) and its heteroelement analogues.
Scheme 2: Conformational ring inversions.
Scheme 3: Rearrangements of the parent cycloheptatriene 1 and norcaradiene 2.
Figure 1: NICS(0) values of fluorinated heteropines.
Scheme 4: Reactivity of oxepine (3) and benzene oxide (4).
Figure 2: Stabilized thiepines 15–18.
Scheme 5: Valence isomerization of 1H-azepines.
Scheme 6: Reactivity of 1H-azepine.
Figure 3: Benzannulated azepines 27 and 28.
Figure 4: Reported phosphepines 29–32.
Scheme 7: Phosphinidene generation from metal-complexed benzophosphepine 33.