Formation of arynezirconocenes from substituted diaryl bis (t-butylcyclopentadienyl) zirconium: application to the synthesis of new functionalized ortho-dichalcogenobenzene compounds
✍ Scribed by J Bodiguel; P Meunier; B Gautheron
- Book ID
- 101572250
- Publisher
- John Wiley and Sons
- Year
- 1991
- Tongue
- English
- Weight
- 484 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0268-2605
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✦ Synopsis
Abstract
The para‐substituted diphenylzirconocenes [(t‐BuCp)~2~Zr(p‐C~6~H~4~R)~2~; R = Br, NMe~2~] (A) were easily obtained from the reaction of the appropriate organolithium reagent with bis(t‐butylcyclopentadienyl)zirconium dichloride. Elimination of bromobenzene or N,N‐dimethylaminobenzene from A by slight heating led to arynezirconocenes into which were inserted two equivalents of elementary chalcogens. As a result dichalcogenated zirconacycles [(t‐BuCp)~2~ZrY~2~C~6~H~3~R; Y = S, Se] (B) were obtained. Complexes B constitute useful potential synthons in organic synthesis and a large family of new functionalized dichalcogenated benzenic compounds was prepared by reacting electrophiles.
The structure of complexes B as well as related benzenic derivatives has been confirmed by microanalysis, ^1^H NMR and mass spectrometry.