Integrating Terminal CoBrn Salts into a 2D Cobalt(II) Coordination Polymer to Promote the β-(E)-Selective Hydroboration of Alkynes

In the present study, 2D Co(II) coordination polymers (CP-1), which integrate terminal CoBrn (CoBr2 and CoBr3) sites immobilized on the framework, are synthesized at the gram level. As a special heterogeneous catalyst, CP-1 shows regioselectivity (beta:alpha>99:1) and stereoselectivity (only E configuration) in the hydroboration of alkynes. The hydroboration reaction conditions are mild and cover a broad substrate range (31 examples). In addition, the heterogeneous catalyst can be recycled for at least five times.

Automated summary

In this study, 2D Co(II) coordination polymers (CP-1) with immobilized terminal CoBrn (CoBr2 and CoBr3) sites on the framework were synthesized at the gram level. As a special heterogeneous catalyst, CP-1 exhibited high regioselectivity (beta:alpha>99:1) and stereoselectivity (only E configuration) in the hydroboration of alkynes. The reaction conditions were mild and suitable for a wide range of substrates (31 examples). Moreover, the heterogeneous catalyst could be recycled for at least five times.