327056-62-2Relevant articles and documents
An improved Balz-Schiemann reaction enabled by ionic liquids and continuous processing
Snead, David R.,Lévesque, Fran?ois,Morris, William J.,Naber, John R.
, p. 4261 - 4265 (2019/05/24)
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.
Heteropolycyclic compounds and their use as metabotropic glutamate receptor antagonists
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, (2008/06/13)
The present invention provides compounds and pharmaceutical compositions that act as antagonists at metabotropic glutamate receptors, and that are useful for treating neurological diseases and disorders. Methods of preparing the compounds also are disclosed.