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ChemInform Abstract: Deprotonative Magnesation and Cadmation of [1,2,3]Triazolo[1,5-a]pyridines

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ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text”
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    ChemInform 2009, 40, issue 19© 2009 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim www.cheminform.wiley-vch.de Fused pyridine derivativesR 0450 Deprotonative Magnesation and Cadmation of [1,2,3]Triazolo[1,5-a]pyridines.  — Treatment of triazolopyridines of type (I) with lithium tributylmagnesate or lithium cadmate results in regioselective formation of 7-deprotonated compounds which after trapping with electrophiles or Pd-catalyzed cross-coupling allow efficient access to 7-functionalized derivatives. Reaction of the pyridine (IX) does not yield the expected 7-substituted compound but the rearranged product (X). In some cases, regioselective dideprotonation is also possible giving derivatives like (III) and (IV). — (BENTABED-ABABSA, G.; BLANCO, F.; DERDOUR, A.; MONGIN*, F.; TRECOURT, F.; QUEGUINER, G.; BALLESTEROS, R.; ABARCA, B.; J. Org. Chem. 74 (2009) 1, 163-169; Lab. Chim. Photonique Mol., Univ. Rennes, F-35042 Rennes, Fr.; Eng.) — Jannicke   19-145
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