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Cooperative Reactivity of Unsupported Early−Late Heterobimetallics:  Ring Opening and Subsequent Decarbonylation of Biaryllactones

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journal contribution
posted on 09.04.1998, 00:00 by Andreas Schneider, Lutz H. Gade, Matthias Breuning, Gerhard Bringmann, Ian J. Scowen, Mary McPartlin
Reaction of the heterodinuclear complex [HC{SiMe2N(2-FC6H3)}3Zr−FeCp(CO)2] (1) with 1,3-dimethyl-6H-benzo[b]naphtho[1,2-d]pyranone (2) and 1,3-dimethoxy-6H-benzo[b]-naphtho-[1,2-d]pyranone (3) led to immediate ring opening of the lactones to yield products which combine the biaryl fragment with aryloxyzirconium and acyl−FeCp(CO)2 units. The latter slowly decarbonylate to yield the corresponding heterobimetallic complexes in which the {MCp(CO)2} fragment is directly bonded to the naphthalene ring.