Tetrahedron p. 8817 - 8821 (2014)
Update date:2022-08-11
Topics:
Zhang, Chao
Zhan, Zhajun
Lei, Min
Hu, Lihong
A facile and efficient method for Ullmann-type C-N coupling reaction of amine and aryl halide catalyzed by CuI/metformin in EtOH is described. The advantages of this method are the use of an inexpensive and readily available catalyst and ligand, easy workup, shorter reaction time, improved yields, and the use of green solvent. Furthermore, this procedure is applied successfully for the modification of natural products, such as Vindoline and Tabersonin.
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