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Stereodivergent Formation of Alkenylsilanes: syn or anti Hydrosilylation of Alkynes Catalyzed by a Cyclopentadienylcobalt(I) Chelate Bearing a Pendant Phosphane Tether
Author(s) -
Yong Li,
Kirleis Karin,
Butenschön Holger
Publication year - 2006
Publication title -
advanced synthesis and catalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.541
H-Index - 155
eISSN - 1615-4169
pISSN - 1615-4150
DOI - 10.1002/adsc.200606028
Subject(s) - triethylsilane , hydrosilylation , chemistry , triethoxysilane , stereoselectivity , catalysis , chelation , alkyne , silanes , medicinal chemistry , stereochemistry , organic chemistry , silane
The hydrosilylation of alkynes is catalyzed by the di‐ tert ‐butylphosphanylethylcyclopentadienylcobalt chelate 1 . While the reaction of internal alkynes exclusively affords syn hydrosilylation products with triethylsilane, the reaction with triethoxysilane shows predominant anti stereoselectivity. Reactions of terminal alkynes are less selective with triethylsilane and result in cyclotrimerization when triethoxysilane is used.