Back to results
US 9,284,340 B2Granted
Oxasilacycles and method for the production thereof
AssigneeWacker Chemie AG
InventorsTobias Halbach, Juergen Stohrer, Bernhard Rieger, Christian Anger
Life of this patent
Estimating the term…
Abstract
Oxasilacycles are prepared by the intramolecular condensation of silanes bearing Si-bonded hydrogen and ethylenically unsaturated radicals in the presence of a triorganoborane, aminoborane complex, or phosphine-borane complex as a hydrosilylation catalyst. Spirocyclic oxasilacycles, and alkoxy-substituted oxaspirocycles with quaternary substitution of a C atom adjacent to oxygen may be prepared.
Claims17
A process for preparing oxasilacycles of the formulae (1) or (2)
- wherein silanes of the formulae (3) or (4), respectively,
- are reacted in the presence of a triorganoborane BR3, aminoborane complex R3NBH3, or phosphine-borane R3PBH3 hydrosilylation catalyst,
- where
- R is an C1-12 hydrocarbyl radical optionally substituted by halogen atoms,
- R1, R2, R1′, and R2′ are hydrogen, halogen, cyano, OH, an optionally substituted C1-50 hydrocarbyloxy radical, an optionally substituted C1-50 acyloxy radical, or an optionally substituted C1-50 hydrocarbyl radical, in which one or more nonadjacent carbon atoms of the optionally substituted C1-50 hydrocarbyloxy, C1-50 acyloxy, or C1-50 hydrocarbyl radicals are optionally replaced by heteroatoms selected from the group consisting of N, O, P, and S, where two or three of the radicals R1, R2, R1′, and R2′ are optionally joined to one another,
- R3, R4, R3′, and R4′ are optionally substituted C1-50 hydrocarbyl radicals, in each of which one or more nonadjacent carbon atoms are optionally replaced by heteroatoms selected from the group consisting of N, O, P, and S, or is an organic polymer radical,
- R5 and R6 are optionally substituted C1-50 hydrocarbyl radicals, in each of which one or more nonadjacent carbon atoms are optionally replaced by heteroatoms selected from the group consisting of N, O, P, and S,
- m is 0, and
- n, and n′ are at least 1.
6 more elements
A process for preparing oxasilacycles of the formulae (1)
- wherein silanes of the formulae (3),
- are reacted in the presence of a triorganoborane BR3, aminoborane complex R3NBH3, or phosphine-borane R3PBH3 hydrosilylation catalyst,
- where
- R is an C1-12 hydrocarbyl radical optionally substituted by halogen atoms,
- R1 and R2′ are hydrogen, halogen, cyano, OH, an optionally substituted C1-50 hydrocarbyloxy radical, an optionally substituted C1-50 acyloxy radical, or an optionally substituted C1-50 hydrocarbyl radical, in which one or more nonadjacent carbon atoms of the optionally substituted C1-50 hydrocarbyloxy, C1-50 acyloxy, or C1-50 hydrocarbyl radicals are optionally replaced by heteroatoms selected from the group consisting of N, O, P, and S, where two or three of the radicals R1 and R2 are optionally joined to one another,
- R3 and R4′ are optionally substituted C1-50 hydrocarbyl radicals, in each of which one or more nonadjacent carbon atoms are optionally replaced by heteroatoms selected from the group consisting of N, O, P, and S, or is an organic polymer radical,
- R5 and R6 are optionally substituted C1-50 hydrocarbyl radicals, in each of which one or more nonadjacent carbon atoms are optionally replaced by heteroatoms selected from the group consisting of N, O, P, and S,
- n is at least 1.
5 more elements
Dependencies are inferred from the claim text.