Journal
ORGANOMETALLICS
Volume 24, Issue 24, Pages 5802-5806Publisher
AMER CHEMICAL SOC
DOI: 10.1021/om050533m
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1,4-Hydrosilylation of dienes catalyzed by late transition metals constitutes a straightforward access to allylsilanes. However, when unsymmetric dienes are used, it generally leads to a mixture of regioisomers (tail or head products) via Z-specific 1,4-addition. Here we describe the first catalytic anti-1,4-hydrosilylation of dienes using the cheap and stable Cp2TiF2 complex as catalyst. It affords E-allylsilanes in good to excellent yields with an unprecedented regio- and diastereoselectivity. Dehydrogenative double silylation of dienes can be selectively obtained by simply changing the activation protocol of the precatalyst.
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