Use of cyclohexa-2,5-dien-1-yl-silanes as precursors for gaseous hydrosilanes
AssigneeTechnische Universitaet Berlin
InventorsMartin Oestreich, Antoine Simonneau
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Abstract
A method of making hydrosilanes having a formula R1R2R3SiH by reacting a compound having formula I: in solution using a strong Lewis acid. This way, e.g., alkenes or carbonyl compounds can be hydrosilylated in good yields using the cyclohexa-2,5-dien-1-yl-silanes of general formula I as transfer hydrosilylating agents in the presence of a strong Lewis acid as catalyst with concomitant formation of an arene solvent.
Claims14
A method for making hydrosilanes having formula R1R2R3SiH (Ia), by reacting a compound having formula I with a Lewis acid of general formulae II or IIa:
- wherein
- R1 and R2 represent independently from each other C1-C3-alkyl or C1-C3-alkoxy,
- R3 represent independently from R1 and R2 H, C1-C3-alkyl, C1-C3-alkoxy or aryl and
- R4 and R5 represent independently from each other H, C1-C3-alkyl or R1R2R3Si with R1 to R3 as defined above,
- R is methyl or ethyl,
- m+n=5, m=0 to 5 and n=0 to 5,
- with concomitant formation of an arene solvent.
A method comprising reacting cyclohexa-2,5-dien-1-yl-silanes of general formula (I)
- wherein
- R1 and R2 represent independently from each other C1-C3-alkyl or C1-C3-alkoxy,
- R3 represent independently from R1 and R2 H, C1-C3-alkyl, C1-C3-alkoxy or aryl and
- R4 and R5 represent independently from each other H, C1-C3-alkyl or R1R2R3Si with R1 to R3 as defined above,
- and a Lewis acid of general formula II or IIa
- B(C6FmHn)3 (II)
- wherein m+n=5, m=0 to 5 and n=0 to 5,
- BF3.O(R)2 (IIa)
- wherein R is methyl or ethyl,
- for hydrosilylation of alkenes and carbonyl compounds under concomitant formation of an arene solvent.
Dependencies are inferred from the claim text.