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2005
Organo-silicon compounds
S 0060
Cleavage of C—Si Bond by Intramolecular Nucleophilic Attack: Lithiation-ProFormation of Siloles from 1-Bromo-4-trisubstituted Silyl-1,3-butadiene
19- 195 moted
Derivatives. — Lithiation of 1-bromo-4-silyl-1,3-butadienes (I) with tert-BuLi affords
substituted siloles (II) through cleavage of one of the three Si-alkyl groups. Butadienes
(III) and (V) containing different substituents on Si reveal, that vinyl and phenyl are
cleaved much more easily whereas methyl is cleaved over isopropyl exclusively. —
(WANG, Z.; FANG, H.; YI*, Z.; Tetrahedron Lett. 46 (2005) 3, 499-501; Key Lab.
Bioorg. Chem. Mol. Eng. Minist. Educ., Coll. Chem. Mol. Eng., Peking Univ.,
Beijing 100871, Peop. Rep. China; Eng.) — Mais
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