Regioselectivity and Steric Course of Lewis Acid Promoted Ring Enlargement of Cyclohexadiene Complexes with Carbon Monoxide
Treating the tricarbonyliron complexes 5 and 7 of substituted cyclohexadienes with AlCl3 yields complexes 6, 8, and 9 of seven-membered ring ketones, containing carbon monoxide inserted into one of the double bonds with high regioselectivity depending on the substitution pattern.The mechanism of this ring enlargement is discussed, and an X-ray analysis of 8e is carried out.
Eilbracht, Peter,Jelitte, Ruediger,Walz, Leonhard
p. 3473 - 3489
(2007/10/02)
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