期刊
SYNLETT
卷 -, 期 13, 页码 1990-1996出版社
GEORG THIEME VERLAG KG
DOI: 10.1055/s-0029-1219816
关键词
dendrimers; heterogeneous catalysis; supported catalysis; palladium; cross-coupling
资金
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) [20031011]
- Niigata University
- Grants-in-Aid for Scientific Research [20031011] Funding Source: KAKEN
Palladium acetate was noncovalently immobilized as a supported ionic liquid catalyst (SILC) in a nanosilica dendrimer, PAMDMAM, with the aid of an ionic liquid to form a cluster catalyst of palladium nanoparticles. The pseudo-homogeneous heterogenized catalyst, Pd-nanoPAMDMAM-SILC, was effective for Suzuki-Miyaura reactions of ortho-substituted aryl bromides or aryl triflates without a ligand in 50% aqueous ethanol in air at room temperature. The catalyst could be re-used up to five times in 93% average yield after simple centrifugation. TON reached 176,000.
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