Boreskov Institute of Catalysis of the Siberian Branch of Russian ...

PP-III-19Our method has some advantages and merits over traditional multistep ways for synthesisof these acids:• high yields (> 95 %) and selectivity (> 98 %),• low energy and feedstock consumption,• greater ecological cleanness,• Versatility.1. the possibility of the wide range acids production using the same equipment, underthe same very mild conditions with the same cobalt carbonyl catalyst,2. the possibility of the extension of range and types of obtaining acids as necessary,(an example, synthesis of heteroarylcarboxilic acids [3]),3. extension of the fields of application this method and technology, as an example forutilization of persistent organic pollutant (POP) – polychlorobiphenyls (PCBs).PCBs are widespread stable dielectric fluids that have previously been produced on alarge scale and are used mainly in transformers. At present it is well known that PCBs aredioxin-like POPs, which pose the serious hazard to the environment and humans. Thenecessity of their destruction or utilization is put forward by the Stockholm InternationalConvention on POPs. Since PCBs are very resistant to biological or chemical degradation, theproblem of their involvement in chemical reactions presents a real challenge. The cobaltcarbonyl – epoxide – base catalytic system turned out to be useful for reactions withespecially inert substrates such as PCBs. Our experiments with specially synthesizedindividual PCB congenrrs and commercial PCB –Sovtol-10 speciments relevant that all theseobjects can be involvedwell into the carbonylation reaction, yielding new products – bi- andthree-biphenylcarboxylicacids.This work was supported by RFBI (RF-0803-90104-Mol_a).References1. T.E. Zhesko, V.P. Boyarskiy, А.G. Nikitina. J. Gen. Chem. 1998, V.68, N 1, P.85 (russ).2. T.E. Zhesko, V.P. Boyarskiy, А.G.Nikitina. J. Appl. Chem. 2007, V.80, N 6, P.967 (russ).3. V.P. Boyarskiy, T.E. Zhesko, E.V. Larionov. J. Appl. Chem. 2007, V.80, N.4, P.584 (russ).4. V.P. Boyarskiy, S.A. Lanina, T.E. Zhesko, V.A. Nikiforov. Organohalogen Compounds 2003, V.63. P.268-271.5. V.P. Boyarskiy, T.E. Zhesko, S.A. Lanina, G.F. Tereshchenko. J. Appl. Chem. 2007,V.80, P.1120-1126(russ).340