tri-palladium clusters [Pd3]+ were successfully applied in the catalytic Sonogashira and Heck couplings. For both reactions, these palladium triangles showed excellent reactivities even in gram-scale syntheses and presented exclusive selectivity to aryl iodides over the other halogenated aromatics. HRMS tracking of [Pd3]+ in both reactions revealed their robustness.
Efficient synthesis of unsymmetric diarylalkynes from decarboxylative coupling in a continuous flow reaction system
作者:Hee Joon Lee、Kyungho Park、Goun Bae、Jaehoon Choe、Kwang Ho Song、Sunwoo Lee
DOI:10.1016/j.tetlet.2011.07.091
日期:2011.9
Unsymmetric diaryl alkynes were synthesized from the palladium-catalyzed decarboxylative coupling of aryl halides and propiolic acid using a continuous flow reaction system. This flow chemistry system continuously gave the desired products in moderate to good yields, and produced less byproduct than was formed in the batch reaction. (C) 2011 Elsevier Ltd. All rights reserved.