Cobalt(II) Coordination Polymer as a Precatalyst for Selective Hydroboration of Aldehydes, Ketones, and Imines

Highly effective
hydroboration precatalyst is developed based on
a cobalt­(II)-terpyridine coordination polymer (CP). The hydroboration
of ketones, aldehydes, and imines with pinacolborane (HBpin) has been
achieved using the recyclable CP catalyst in the presence of an air-stable
activator. A wide range of substrates containing polar CO
or CN bonds have been hydroborated selectively in excellent
yields under ambient conditions.

本研究开发了一种基于钴(II)-三联吡啶配位聚合物（coordination polymer, CP）的高效硼氢化预催化剂。借助该可回收的CP催化剂，在空气稳定型活化剂的存在下，成功实现了酮、醛及亚胺与频哪醇硼烷（pinacolborane, HBpin）的硼氢化反应。多种含有极性C=O或C=N双键的底物均可在常温常压条件下高选择性地发生硼氢化反应，且获得优异的反应收率。