DEUTERATED NUCLEOSIDE PRODRUGS USEFUL FOR TREATING HCV
申请人:Achillion Pharmaceuticals, Inc.
公开号:US20140309164A1
公开(公告)日:2014-10-16
Deuterated nucleoside analogs of Formula (I) and the pharmaceutically acceptable salts thereof are provided by this disclosure
The variables, e.g., B
1
, Y, R
1
, R
2
, R
3
, R
3
′, R
4
, R
5
, R
6
, R
7
, R
8
, and R
9
carry definitions set forth in the disclosure. Compounds of Formula (I) are deuterated at one or more positions and the deuterium enrichment at each deuterated positions is at least 50%. Compounds and salts of Formula (I) are useful for treating viral infections, including HCV infections.
The proton-to-deuterium exchange reaction of the hydrogenatom at the 5-position of 15 pyrimidinederivatives has been studied. The exchange proceeds under both acidic and alkaline conditions. Under acidic conditions, the mechanism involves protonation at the 5-position (forming an σ complex), whereas under alkaline conditions the exchange is mainly a result of the formation of a tautomeric equilibrium
5′-Deuterated nucleosides and nucleotides and modifications thereof are provided for use in medical therapies, including as antiviral, anti-tumor and anti-neoplastic agents. In one embodiment, compounds, methods and uses are provided for the treatment of hepatitis C, RSV, HSV and other viral diseases in a host, including a human.
Biogenesis of the Unique 4′,5′-Dehydronucleoside of the Uridyl Peptide Antibiotic Pacidamycin
作者:Amany E. Ragab、Sabine Grüschow、Daniel R. Tromans、Rebecca J. M. Goss
DOI:10.1021/ja206163j
日期:2011.10.5
The pacidamycins belong to a class of antimicrobial nucleoside antibiotics that act by inhibiting the clinically unexploited target translocase I, a key enzyme in peptidoglycan assembly. As with other nucleoside antibiotics, the pacidamycin 4',5'-dehydronucleoside portion is an essential pharmacophore. Here we show that the biosynthesis of the pacidamycin nucleoside in Streptomyces coeruleorubidus proceeds through three steps from uridine. The transformations involve oxidation of the 5'-alcohol by Pac11, transamination of the resulting aldehyde by Pac5, and dehydration by the Cupin-domain protein Pac13.