Copper-catalyzed tandem coupling of 1, 4-dihalo-1, 3-dienes with azoles via an N− H bond and its adjacent C− H bond activation has been described. The reaction exhibits good regioselectivity when unsymmetrical 1, 4-dihalo-1, 3-diene is employed. This method provided a novel route to the synthesis of nitrogen-bridgehead azolopyridine derivatives.
[Parenty, Alexis D. C.; Guthrie, Kevin M.; Song, Yu-Fei; Smith, Louise V.; Burkholder, Eric; Cronin, Leroy Chemical Communications, 2006 , # 11 p. 1194 - 1196]
[Parenty, Alexis D. C.; Guthrie, Kevin M.; Song, Yu-Fei; Smith, Louise V.; Burkholder, Eric; Cronin, Leroy Chemical Communications, 2006 , # 11 p. 1194 - 1196]