3
relatively weak. The yield and the selectivity were only 34% and
73/22, respectively. PtO2 even did not catalyze the reaction.
Conclusions
In summary, the hydrosilylation reaction of a wide variety of
functionalized alkenes with triethoxysilane in the presence of
(dicyclopentadiene) platinum(II) dichloride catalyst had been
studied. The hydrosilylation reaction of aminated alkenes got
high yield and good selectivity. Although it was impossible to
directly carry out the hydrosilylation of a diamino chelating
alkene with triethoxysilane, after the protection of the amino
groups, the hydrosilylation worked well.
Table 2. Different Pt-catalysts for the hydrosilylation of
compound 1 with the triethoxysilane reagent.
reaction
time(h)
Yielda
(%)
Ratioa
Entry
Catalyst
(γ/β)
(dicyclopentadiene)
1
2
3
20
20
20
81
83
34
88/12
89/11
73/22
platinum(II) dichloride
Acknowledgments
Karstedt catalyst
H2PtCl6 •6H2O
This work was supported by the National Natural Science
Foundation of China under grant No. 21371096.
Supporting Information
The following contents are supplied: Synthesis and NMR
characterization.
4
PtO2
20
0
/
a Calculated on the basis of 1H NMR spectrum.
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a Calculated on the basis of 1H NMR spectrum