CuSCN-mediated homocoupling of terminal alkynes to 1,3-diynes using 4-nitrobenzenediazonium tetrafluoroborate as oxidant

Eleven 1,3-diynes have been prepared by a highly efficient base-catalysed homocoupling of terminal alkynes mediated by a novel combination of CuSCN/4-nitrobenzenediazonium tetrafluoroborate.