期刊
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
卷 2008, 期 23, 页码 4019-4024出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejoc.200800119
关键词
diimine ligands; diamine ligands; palladium complexes; Suzuki cross-coupling; biaryl compounds; polychlorinated biphenyls (PCBs); biphenylcarboxylic acids (BCAs); Suzuki reaction
资金
- Academy of Finland [110043]
- Liaoning Natural Science Foundation for the Talent Doctors Fund [110043/RF, 122350/KR]
- Academy of Finland (AKA) [110043, 110043] Funding Source: Academy of Finland (AKA)
Several novel diimines (Salen-type ligands) 2a-2i and their reduced diamine counterparts 3b,3d-3g and 3i form complexes 4a-4i, 5b,5d-5g, and 5i with PdCl2 in DMF or methanol. Using 1 mol-% of the isolated complexes 4e and 5f many polychlorinated biphenyls (PCBs) can be prepared in moderate to excellent yields according to the Suzuki cross-coupling protocol with contact to air. Several 4-acetylbiphenyls prepared by this method can be converted in moderate yields into the corresponding biphenylcarboxylic acids (BCAs) by alkaline cleavage. An X-ray crystal structure determination confirms the structure of complex 5f. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008).
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