[EN] AMINO-PYRIDINE-CONTAINING SPLEEN TYROSINE KINASE (SYK) INHIBITORS<br/>[FR] INHIBITEURS DE LA TYROSINE KINASE DE LA RATE (SYK) CONTENANT AMINO-PYRIDINE
申请人:MERCK SHARP & DOHME
公开号:WO2014074422A1
公开(公告)日:2014-05-15
The invention provides certain amino-pyridine-containing compounds of the Formula (I) (I) or pharmaceutically acceptable salts thereof, wherein R3, R4, R5, R6, and the subscript n are as defined herein. The invention also provides pharmaceutical compositions comprising such compounds, and methods of using the compounds for treating diseases or conditions mediated by Spleen Tyrosine Kinase (Syk) kinase.
iodine-magnesium exchange. In many cases, the exchange can be extended to heteroaryl bromides, and a case of a chlorine-magnesium exchange is described with tetrachlorothiophene. This new preparation of functionalized heteroarylmagnesium compounds provides after reaction with various electrophiles a new entry to a broad range of polyfunctional pyridines, imidazoles, furanes, thiophenes, pyrroles, antipyrines
Functionalized iodopyridines bearing either a chloride, ester or nitrile function were converted to the corresponding organomagnesium derivatives at -40 °C or -78 °C by treatment with i-PrMgBr (1.1 equiv, 0.5 h, > 90% yield). The resulting functionalized Grignard reagents react with aldehydes, TosCN directly or with allylic bromides and benzoyl chloride after transmetalation with CuCN leading to polyfunctional pyridines.