6290
F. Ferreira et al. / Tetrahedron Letters 45 (2004) 6287–6290
`
the ÔMinistere de la recherche et de la TechnologieÕ for
the award of a researchship.
3722.10
References and notes
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In conclusion a strategy using silyl protecting groups on
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Acknowledgements
This work was supported by grant from ÔAssociation
pour la Recherche sur le CancerÕ (ARC), F.F. thanks