Snead, David R. published the artcileAn improved Balz-Schiemann reaction enabled by ionic liquids and continuous processing, Application of Picolinonitrile, the main research area is verubecestat synthetic intermediate synthesis; Balz Schiemann cyanopyridinamine ionic liquid continuous process safety; cyanofluoropyridine synthesis.
A Balz-Schiemann reaction was developed to convert 2-cyano-5-aminopyridine to 2-cyano-5-fluoropyridine. The use of an ionic liquid (1-butyl-3-methylimidazolium tetrafluoroborate, BMIMBF4) as a solvent was found to be critical in achieving high assay yields and high selectivity for the fluorination vs. protonation. A process was developed to recycle and reuse the ionic liquid enabling its cost-effective use as a solvent. Finally, the optimal conditions were demonstrated under as a continuous process to address process safety risks associated with diazonium intermediates and the product was used to access a key intermediate in the synthesis of β-amyloid cleaving enzyme 1 inhibitor, verubecestat.
Tetrahedron published new progress about Flow reactors (for continuous processing). 100-70-9 belongs to class nitriles-buliding-blocks, name is Picolinonitrile, and the molecular formula is C6H4N2, Application of Picolinonitrile.
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts