Pyridine borane complex

Pyridine borane complex (CAS 110-51-0, EC 203-773-4, formula C5H8BN) is a borane-pyridine coordination compound in which pyridine stabilises the reactive borane group, moderating its reducing activity. It is also referenced under the names NSC 10219, pyridineborane, and borane-pyridine. No E-code designation applies to this substance.

In pharmaceutical synthesis, pyridine borane serves as a selective reducing agent for imines and iminium ions, enabling reductive amination steps without over-reducing sensitive functional groups. In electronics and biotechnology applications, it functions as a controlled source of borane for hydroboration reactions, delivering boron to unsaturated substrates under milder conditions than free borane complexes.

Pyridine borane complex is supplied as a liquid grade and is subject to REACH registration requirements within the European Economic Area. The HS classification is 29333990. Procurement teams should confirm purity specifications, inhibitor content, and packaging configurations directly with the supplier to meet formulation or process requirements.