A Pd(II) salen complex anchored to multi-walled carbon nanotubes showed excellent catalytic activity and stability for the Mizoroki-Heck and Hiyama cross-couplings of aryl halides with olefins and phenylsiloxanes. Furthermore, the heterogeneous catalyst could be reused up to four times with the catalytic activity being recovered easily after simple manipulations.
Air‐stable CuI/cryptand‐22 complex was found to be a highly active catalyst for the solvent‐free cross‐coupling reaction of terminal alkynes with different acyl chlorides in the presence of Et3N as base to give the corresponding ynones in quantitative yields.
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