Stereoselective Control in the Base-Catalyzed H/D Exchange of 5,6-Dimethylidene-2-bicyclo[2.2.n]alkanone Tricarbonyliron Complexes. Revision of the Structures of Tricarbonyliron Complexes of 5,6-Dimethylidenebicyclo[2.2.2]oct-2-ene and 5,6-Dimethylidenebicyclo[2.2.1]hept-2-ene
β Scribed by Charls A. Barras; Rymond Roulet; Pierre-Alain Carrupt; Fabienne Berchier; Pierre Vogel
- Publisher
- John Wiley and Sons
- Year
- 1984
- Tongue
- German
- Weight
- 897 KB
- Volume
- 67
- Category
- Article
- ISSN
- 0018-019X
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π SIMILAR VOLUMES
d6 and ds Metal Carbonyl Complexes of 7,7-Dimethoxy-5,6-dimethylidenebicyclo[2.2.l]hept-2-ene.
The I-dimethoxymethyl-5,6-dimethylidene-7-oxabicyclo[2.2. I jhept-2-ene (9) has been prepared. On treatment with Fe,(CO),, the endocyclic double bond C(2)=C(3) was coordinated first giving the Corresponding exo-Fe(C0)4 complex 10. The latter reacted with Fe,(CO), and afforded cis-heptacarbonyl-p -[(
## Abstract The __Friedel__β__Crafts__ monoacylation of __trans__βΞ·β[(1__RS__,2__RS__,4__SR__,5__SR__,6__RS__,7__SR__,8__SR__)β__C__,5,6,__C__βΞ·:__C__,7,8,__C__βΞ·β(5,6,7,8βtetramethylideneβ2βbicyclo[2.2.2]octyl acetate)]βbis(tricarbonyliron) ((Β±)β**5**) is highly stereoselective and yields __trans_
The endocyclic double bond C(2),C( ) in 5,6-dimethylidene-7-oxabicyclo[2.2.1]hept-2-ene (1) can be coordinated selectively on its exo-face before complexation of the exocyclic s-cis-butadiene moiety. Irradiation of Ru,(CO),, or Os,(CO),, in the presence of 1 gave tetracarbonyl[(lR,2R,3S,4S)-2,3-~-(5