9-Borabicyclononane

9-Borabicyclononane (CAS 280-64-8), commercially supplied as its stable dimer 9-borabicyclo[3.3.1]nonane dimer, is a selective hydroboration reagent used in synthetic chemistry. It enables precise, stereoselective addition of boron to alkenes, making it a preferred reagent for building chiral intermediates in complex molecule synthesis for various industries.

In pharmaceutical manufacturing, it is used to produce enantiomerically enriched intermediates for active pharmaceutical ingredients where stereochemical control is critical for the final product. Suzuki–Miyaura cross-coupling reactions rely on it as a boron source to form carbon–carbon bonds in the synthesis of drug candidates and fine chemicals for global distribution.

Biotechnology and life sciences researchers use it in the preparation of labeled compounds and probe molecules for biological assays and advanced diagnostic testing procedures. Industrial cleaning and specialty chemical formulators source it as a catalyst precursor in boron-mediated reaction sequences requiring high regioselectivity and consistent chemical performance.

9-Borabicyclononane is supplied as a solid dimer or as stabilized solutions in tetrahydrofuran or other anhydrous solvents. Standard concentrations for solution grades are typically 0.5 M and 1.0 M. Material is available at research, pilot, and commercial scale, with specifications aligned to pharmaceutical-grade synthetic reagent requirements and rigorous quality control protocols.