A facile method for the dechlorination of mono- and dichlorobiphenyls using Raney Ni–Al alloy in dilute aqueous solutions of alkali hydroxides or alkali metal carbonates

Raney Ni–Al alloy in a dilute aqueous alkaline solution of NaOH, KOH, CsOH, LiOH, or Ca(OH) 2 or of alkali metal carbonates such as Na 2CO 3, K 2CO 3 becomes a very powerful reducing agent and dechlorinates the polychlorobiphenyl(PCB) congeners mono- and dichlorobiphenyls effectively to afford biphe...

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Bibliographic Details
Published in:Tetrahedron 2009-03, Vol.65 (12), p.2497-2505
Main Authors: Liu, Guo-Bin, Tashiro, Masashi, Thiemann, Thies
Format: Article
Language:English
Subjects:
Alicyclic compounds
Alicyclic compounds, terpenoids, prostaglandins, steroids
Chemistry
Exact sciences and technology
Noncondensed benzenic compounds
Organic chemistry
Preparations and properties
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Summary:Raney Ni–Al alloy in a dilute aqueous alkaline solution of NaOH, KOH, CsOH, LiOH, or Ca(OH) 2 or of alkali metal carbonates such as Na 2CO 3, K 2CO 3 becomes a very powerful reducing agent and dechlorinates the polychlorobiphenyl(PCB) congeners mono- and dichlorobiphenyls effectively to afford biphenyl and/or phenylcyclohexane, respectively. The reactions are run under mild conditions without the use of organic solvents. The reductive dechlorination of dichlorobiphenyls with a Raney Ni–Al alloy under ultrasonication was investigated, also. [Display omitted]
ISSN:0040-4020
1464-5416
DOI:10.1016/j.tet.2009.01.052