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DOI: 10.1055/s-0029-1218632
A Direct, Copper-Catalyzed Functionalization of Pyridines with Alkynes
Publication History
Publication Date:
04 January 2010 (online)

Abstract
A one-pot, copper-catalyzed method to construct 2-alkynylpyridines is presented. This provides a route to access these products directly from terminal alkynes and the parent pyridine, and without prefunctionalization of the pyridine core. In addition, (Z)-alk-2-enylpyridines can be prepared via a related procedure. These reactions are used to synthesize a number of new alkynyl- and alkenyl-substituted pyridines in one pot.
Key words
pyridine - copper - catalytic - alkyne - alkene
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References
Minor amounts of the 2,5-substituted pyridine isomer are observed with the product in Table [³] , entry 2.
27The coupling constant J for trans-isomers is always larger (>10 Hz) than cis-isomers and is typically ∼15 Hz for E-alkenylpyridines (see ref. 25).