Ce. Anson et al., ETA(4) TO ETA(5) - STEREOCONTROLLED REACTIVATION OF EXOCYCLIC TRIENE IRON COMPLEXES, Tetrahedron letters, 39(41), 1998, pp. 7603-7606
The protonation of prochiral exocyclic double bonds in cyclohexa-2,4-d
ieneiron(0) complexes introduces a chiral centre adjacent to the emerg
ent eta(5)-cyclobexadienyliron(1+) portion of the product. This reacti
on has been shown to be fully diastereoselective. The stereochemical c
ourse of the reaction has been elucidated by X-ray crystallography and
correlated with a complementary procedure starting from dienol comple
xes. (C) 1998 Elsevier Science Ltd. All rights reserved.