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2005
Pyridine derivatives
R 0380
Direct Synthesis of Heterobiaryls by Radical Addition to Pyridine: Expeditious
of Chelating Ligands. — Reductive generation of radicals from aryl
25- 136 Synthesis
iodides in pyridine as the solvent results in addition to the pyridine ring to give mixtures
of o-, m-, and p-substituted derivatives. When the iodide is ortho-substituted with a hydrogen bond donor, the isolated ortho-biaryl [cf. (IIIb)] represents a potential bidentate
chelating ligand. — (CRICH*, D.; PATEL, M.; Heterocycles 64 (2004) 499-504;
Dep. Chem., Univ. Ill., Chicago, IL 60607, USA; Eng.) — Mais
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