期刊
CHEMCATCHEM
卷 8, 期 4, 页码 773-778出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.201501112
关键词
alkynes; heterogeneous catalysis; nanocatalysis; palladium; semihydrogenation
资金
- Swedish Research Council (VR)
- Swedish Governmental Agency for Innovation Systems (VINNOVA)
- Knut & Alice Wallenberg Foundation
Herein, the preparation of a heterogeneous catalyst consisting of 1-2nm sized Pd nanoparticles supported on amino-functionalized mesoporous hollow silica nanospheres and its use for the semihydrogenation of mono- and disubstituted alkynes is reported. By utilizing this Pd nanocatalyst together with the green poisoning agent DMSO, high yields of the desired alkenes could be achieved, while suppressing the degree of over-reduction to alkanes. To our delight, the Pd nanocatalyst displayed remarkable chemoselectivity towards the alkyne moiety, allowing the transformation to be carried out in the presence of other reducible functionalities, such as halogens, carbonyl, and nitro groups.
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