Tetramethylsuccinimide as a Directing/Protecting Group in Purine Glycosylations
摘要:
Tetra methylsuccinic anhydride can be used to protect the exocyclic amine of 6-aminopurine derivatives by forming the corresponding tetramethysuccinimide. X-ray crystallography confirms that the imide carbonyl and the methyl groups are positioned to sterically block the N7 nitrogen so that glycosylations occur with very high regiochemical control at N9. This approach Is particularly effective for 3-substituted purines where the substituent tends to block access to N9 and inhibit glycosylation at that site.
[EN] TRIAZOLE FURAN COMPOUNDS AS AGONISTS OF THE APJ RECEPTOR<br/>[FR] COMPOSÉS DE TRIAZOLE FURANE UTILISÉS EN TANT QU'AGONISTES DU RÉCEPTEUR APJ
申请人:AMGEN INC
公开号:WO2018097944A1
公开(公告)日:2018-05-31
Compounds of Formula (I) and Formula (II), pharmaceutically acceptable salt thereof, stereoisomers of any of the foregoing, or mixtures thereof are agonists of the APJ Receptor and have use in treating cardiovascular and other conditions. Compounds of Formula (I) and Formula (II) have the following structures: (I); (II). Intermediates (V) are also claimed.