| Abstract
| - The C−O bond of allylic benzyl ethers was selectively cleavedwith Cp*2Sm(thf)n to giveallylicsamarium complexes in good yields. Facility of their bond fissionhas been found to be comparableto that of the corresponding propargylic ethers intermolecularly, butlower intramolecularly. Regio-and stereochemistry on the electrophilic trapping of the allyliccomplexes thus generated remarkablydepended on the nature of the electrophiles. They reacted withcarbonyl compounds exclusivelyfrom the most substituted terminus of the allylic moieties to yieldblanched homoallylic alcoholswith anti diasteroselectivity. On the other hand, trapping withsilyl chlorides produced linear allylicsilanes. Here, a plausible mechanism to account for the differenceis proposed.
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