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Caltech chemists devise chemical reaction that holds promise for new drug development
Date:1/11/2012

PASADENA, Calif. -- A team of researchers at the California Institute of Technology (Caltech) has devised a new method for making complex molecules. The reaction they have come up with should enable chemists to synthesize new varieties of a whole subclass of organic compounds called nitrogen-containing heterocycles, thus opening up new avenues for the development of novel pharmaceuticals and natural products ranging from chemotherapeutic compounds to bioactive plant materials such as morphine.

The teamled by Brian Stoltz, the Ethel Wilson Bowles and Robert Bowles Professor of Chemistry, and Doug Behenna, a scientific researcherused a suite of specialized robotic tools in the Caltech Center for Catalysis and Chemical Synthesis to find the optimal conditions and an appropriate catalyst to drive this particular type of reaction, known as an alkylation, because it adds an alkyl group (a group of carbon and hydrogen atoms) to the compound. The researchers describe the reaction in a recent advance online publication of a paper in Nature Chemistry.

"We think it's going to be a highly enabling reaction, not only for preparing complex natural products, but also for making pharmaceutical substances that include components that were previously very challenging to make," Stoltz says. "This has suddenly made them quite easy to make, and it should allow medicinal chemists to access levels of complexity they couldn't previously access."

The reaction creates compounds called heterocycles, which involve cyclic groups of carbon and nitrogen atoms. Such nitrogen-containing heterocycles are found in many natural products and pharmaceuticals, as well as in many synthetic polymers. In addition, the reaction manages to form carbon-carbon bonds at sites where some of the carbon atoms are essentially hidden, or blocked, by larger nearby components.

"Making carbon-carbon bonds is hard, but that's what we need to make the complicated struct
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Contact: Deborah Williams-Hedges
debwms@caltech.edu
626-395-3227
California Institute of Technology
Source:Eurekalert  

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