A SIMPLE AND EFFICIENT PALLADIUM CATALYST OF NITROGEN-BASED LIGAND FOR Cu(I)- AND AMINE-FREE SONOGASHIRA REACTION

作者:Guo Meng ping*; Liu Shi wen; Chen San bao; Wen Yong ju; Liang Hui; Lv Mei yun
来源:Synthetic Communications, 2015, 45(6): 777-787.
DOI:10.1080/00397911.2014.989446

摘要

Glycine, as a kind of commercially available and inexpensive ligand, is used to prepare an air-stable and water-soluble catalyst used in Sonogashira reaction in our study. In the presence of 1% [PdCl2(NH2CH2COOH)(2)] as catalyst, excellent catalytic activity towards the Sonogashira coupling of aryl iodides with terminal alkynes without using any additive such as Cu(I)-cocatalyst is observed in a mixture of water and acetone (3/3mL) under air at 60 degrees C with NaOH as a base, giving products in good to excellent yields.