• Clean Technology
• /
• v.17 no.1
• /
• pp.13-18
• /
• 2011

Phosphine ligand-grafted mesoporous silica materials with large pores were prepared for the ligand-modified heterogeneous Pd nanocatalysts. New heterogeneous catalytic system was developed using palladium nanoparticles encapsulated in phosphine ligand-grafted mesoporous silica. The catalyst showed good catalytic activities for Suzuki cross-coupling using bromobenzene derivatives due to excellent phosphine ligand effects. Catalytic results showed nanoparticie catalysts can be recycled twice with decreased yields.

• Bulletin of the Korean Chemical Society
• /
• v.30 no.11
• /
• pp.2697-2700
• /
• 2009

A $Pd(OAc)_2/(o-MeOPh)_3P$ system has been developed for the catalytic Suzuki coupling of aryl bromides with arylboronic acids. Our catalyst system covers a broad spectrum of commonly available arylboronic acids and aryl bromides to provide biaryls in very good yields. The catalyst system works very well in the synthesis of sterically hindered biaryls.

• Bulletin of the Korean Chemical Society
• /
• v.34 no.5
• /
• pp.1477-1480
• /
• 2013

The Suzuki cross-coupling reactions proceeded in excellent yields when it was catalyzed by magnetically recyclable nanocatalyst. This nanocatalyst provided very high catalytic activity with low loading level (1 mol %), because the palladium nanoparticles were so small in size (~2 nm) and located on the surface of the nanocomposite. It was also easily recovered from the reaction mixture using a magnet and reused for six consecutive cycles.

• Bulletin of the Korean Chemical Society
• /
• v.32 no.1
• /
• pp.359-362
• /
• 2011

• Bulletin of the Korean Chemical Society
• /
• v.25 no.1
• /
• pp.29-30
• /
• 2004

• Bulletin of the Korean Chemical Society
• /
• v.24 no.11
• /
• pp.1632-1636
• /
• 2003

Palladium-catalyzed cross-coupling reactions of neopentyloxysulfonylphenyl bromides with arylboronic acids provided a variety of neopentyl biphenylsulfonates in good yields. 2-Bromo- and 4-bromobenzenesulfonates underwent the coupling reaction more rapidly than 3-bromobenzenesulfonate, while chlorobenzenesulfonate did not produce the coupling product under the standard reaction conditions.

• Bulletin of the Korean Chemical Society
• /
• v.24 no.12
• /
• pp.1832-1834
• /
• 2003

• Bulletin of the Korean Chemical Society
• /
• v.23 no.5
• /
• pp.663-664
• /
• 2002

• Journal of the Korean Chemical Society
• /
• v.57 no.3
• /
• pp.361-364
• /
• 2013

A modified synthetic approach to the synthesis of heterocyclic food mutagens, 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PHIP) and 2-amino-1,6-dimethylimidazo[4,5-b]pyridine (DMIP) is reported. This route highlights an optimized palladium catalysed Buchwald cross-coupling of 2-halo-1-methyl-imidazo[4,5-b]pyridine with benzophenoneimine followed by acidic hydrolysis to yield compound 7. Using finely tailored conditions, Suzuki cross-coupling reactions with highly efficient catalytic systems were performed as the final step on 8 to introduce the aryl group and methyl group on the heterocyclic core.

• Bulletin of the Korean Chemical Society
• /
• v.32 no.spc8
• /
• pp.2897-2898
• /
• 2011