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2004
Metathesis reactions
O 0286
Direct Ring-Closing Metathesis of Trienes by Silyl Substitution. — Both the outof cross-coupling and ring-closing metathesis of polyenes can be controlled by
48- 049 come
introduction of a terminal-SiPh2-Me group. Metathesis takes place selectively at the
nonsilylated C=C bonds, whereas the C=C bond containing the silyl group does not react. The resulting products can undergo selective hydrogenation. Subsequent desilylation leads to terminal alkenes which are suitable substrates for further metathesis. —
(SCHULTZ-FADEMRECHT, C.; DESHMUKH, P. H.; MALAGU, K.; PROCOPIOU,
P. A.; BARRETT*, A. G. M.; Tetrahedron 60 (2004) 35, 7515-7524; Dep. Chem.,
Imp. Coll., London SW7 2AZ, UK; Eng.) — Jannicke
2004
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