The use of calcium carbide in one-pot synthesis of symmetric diaryl ethynes.
An efficient Pd-catalyzed copper and amine free coupling reaction of acetylene and aryl bromides was achieved with calcium carbide as an acetylene source, using inorganic base and easily prepared, air-stable aminophosphine ligand in common organic solvents, providing symmetric diaryl ethynes in one-pot with yields ranged from moderate to excellent.
Zhang
Weiwei
W
College of Chemistry and Material Science, Wenzhou University, Mid. Xueyuan Rd, Wenzhou 325027, China.
Wu
Huayue
H
Liu
Zhiqing
Z
Zhong
Ping
P
Zhang
Lin
L
Huang
Xiaobo
X
Cheng
Jiang
J