2007

AlkynesQ 0087 Cyclopalladated Ferrocenylimines: Efficient Catalysts for Homocoupling and So-

nogashira Reaction of Terminal Alkynes. — The ferrocenylimines (I) and (II) are used in the CuI-mediated homocoupling of terminal alkynes to synthesize 1,3-diynes in the air. The catalytic system tolerates several functional groups. (II) is also applied to Sonogashira cross-coupling reactions of aryl iodides, aryl bromides, and some acti-vated aryl chlorides with various terminal alkynes under amine- and copper-free con-ditions. — (YANG, F.; CUI, X.; LI, Y.-N.; ZHANG, J.; GEN, G.-R.; WU*, Y.; Tetrahedron 63 (2007) 9, 1963-1969; Dep. Chem., Zhengzhou Univ., Zhengzhou 450052, Henan, Peop. Rep. China; Eng.) — Bartels

23- 062

2007