| RESEARCH |
. Qiao-Sheng Hu, an assistant professor of chemistry at the College of Staten Island of the City University of New York, also promotes nickel systems as less expensive alternatives. He has shown that the tricyclohexylphosphine-nickel(0) complex, which costs much less, efficiently catalyzes room-temperature couplings of aryl arenesulfonates with boronic acids. He points out that this catalyst works consistently at room temperature with substrates that may not be activated. "The mild reaction conditions, the wide availability of aryl arenesulfonates and the catalyst, and the high yields make this catalytic system very useful in organic synthesis," he says. However, the system needs more work. Nickel(0) is air sensitive, and Hu is testing whether air-stable nickel(II) chloride complexes will work |
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