Step by step palladium mediated syntheses of new 2-(pyridin-2-yl)-6-R-nicotinic acids and esters

Petretto, Giacomo Luigi and Zucca, Antonio and Stoccoro, Sergio and Cinellu, Maria Agostina and Minghetti, Giovanni (2010) Step by step palladium mediated syntheses of new 2-(pyridin-2-yl)-6-R-nicotinic acids and esters. Journal of Organometallic Chemistry, Vol. 695 (2), p. 256-259. ISSN 0022-328X. Article.

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DOI: 10.1016/j.jorganchem.2009.10.002

Abstract

Taking advantage of palladium peculiar “rollover” C,N cyclometallation, it is possible to promote C(3) functionalization of 6-alkyl-substituted-2,2′-bipyridines. The carbonylation reaction of rollover species [Pd(Lⁿ)Cl]₂, (HL¹ = 6-isopropyl-2,2′-bipy, 1; HL² = 6-neopentyl-2,2′-bipy, 2; HL³ = 6-ethyl-2,2′-bipy, 3; HL⁴ = 6-methyl-2,2′-bipy, 4) allowed the synthesis of 2-(pyridin-2-yl)-6-alkyl-nicotinic acids or esters. These nicotinic derivatives are extremely rare and, as far as we know, quite unreported in the case of the 6-substituted molecules.

Item Type:	Article
ID Code:	3687
Status:	Published
Refereed:	Yes
Uncontrolled Keywords:	Cyclopalladated compounds, nitrogen ligands, organic synthesis, nicotinic acid derivatives
Subjects:	Area 03 - Scienze chimiche > CHIM/03 Chimica generale e inorganica
Divisions:	001 Università di Sassari > 01 Dipartimenti > Chimica
Publisher:	Elsevier
ISSN:	0022-328X
Deposited On:	06 Apr 2010 13:05

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