Highly regio- and chemoselective [2 + 2 + 2] cycloaddition of 1,6-heptadiynes with allenes catalyzed by cobalt complexes.
The CoI2(PPh3)2/Zn system effectively catalyzes the [2 + 2 + 2] ene-diyne cycloaddition of 1,6-heptadiynes with allenes in a highly regio- and chemoselective fashion to yield substituted benzene derivatives in good to excellent yields.
Wu
Ming-Si
MS
Department of Chemistry, Tsing Hua University, Hsinchu, Taiwan 300.
Shanmugasundaram
Muthian
M
Cheng
Chien-Hong
CH