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The transition metal complex induced rearrangement of bicyclo[2.1.0]pentane to cyclopentene

✍ Scribed by Paul G. Gassman; Thomas J. Atkins; J. Trevor Lumb

Publisher
Elsevier Science
Year
1971
Tongue
French
Weight
176 KB
Volume
12
Category
Article
ISSN
0040-4039

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✦ Synopsis

Cyclobutane to diolefin trausfcmations prauoted by transition-metal compounds, such as 1-s the isomerisation of quadricyclaues to norbornadienes and of cube type moleculestoring cleaved products, 495 have recently attracted cmsiderable attention. Lately, we' and

The details of the preparation of this material will. be presented in the full paper on this subject.

The Focedure used was a modification of that of G. Wittig and F. Wingler, Chem. .Ber., ?& 2146 (1964), described for the preparation of 2

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✍ Michael A. McKinney; S.K. Chou πŸ“‚ Article πŸ“… 1974 πŸ› Elsevier Science 🌐 French βš– 165 KB

We wish to report the first example of a zinc-catalyzed rearrangement of the bicycle [P.l.O]pentane ring system. Namely, the rearrangement of I-Phenylbicyclo[2.1.O]pentane(b) with a catalytic amount of zinc iodide in benzene (2 hr, 60') to give as the sole product 3-phenylcyclopentene(2a).

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On the nature of carbenoids generated from bicyclo[1.1.0]butanes and transition metal complexes
✍ R. Noyori πŸ“‚ Article πŸ“… 1973 πŸ› Elsevier Science 🌐 French βš– 341 KB

In valence bond description, a complex of a transition metal MxLn (x = oxidation number, L = ligand) and a carbene :CRR' (R, R' = H or carbon function) exists as a resonance hybrid consisting of the ylene form Ia and the two polar contributors, the metal-bonded carbanion Ib (ylide) and the metal-bon