Discovery of Imidazo[2,1-b]thiazole HCV NS4B Inhibitors Exhibiting Synergistic Effect with Other Direct-Acting Antiviral Agents
摘要:
The design, synthesis, and SAR studies of novel inhibitors of HCV NS4B based on the imidazo[2,1-b]thiazole scaffold were described. Optimization of potency with respect to genotype 1b resulted in the discovery of two potent leads 26f (EC50 = 16 nM) and 28g (EC50 = 31 nM). The resistance profile studies revealed that 26f and 28g targeted HCV NS4B, more precisely the second amphipathic alpha helix of NS4B (4BAH2). Cross-resistance between our 4BAH2 inhibitors and other direct-acting antiviral agents targeting NS3/4A, NS5A, and NS5B was not observed. For the first time, the synergism of a series of combinations based on 4BAH2 inhibitors was evaluated. The results demonstrated that our 4BAH2 inhibitor 26f was synergistic with NS3/4A inhibitor simeprevir, NS5A inhibitor daclatasvir, and NS5B inhibitor sofosbuvir, and it could also reduce the dose of these drugs at almost all effect levels. Our study suggested that favorable effects could be achieved by combining 4BAH2 inhibitors such as 26f with these approved drugs and that new all-oral antiviral combinations based on 4BAH2 inhibitors were worth developing to supplement or even replace current treatment regimens for curing HCV infection.
Understanding the Scope of Feist-Bénary Furan Synthesis: Chemoselectivity and Diastereoselectivity of the Reaction Between α-Halo Ketones and β-Dicarbonyl Compounds
作者:Yi Peng、Juan Luo、Qiang Feng、Qiang Tang
DOI:10.1002/ejoc.201600975
日期:2016.10
application of a Paal–Knorr synthesis. In this manuscript, we investigate the chemoselectivity and diastereoselectivity of furansynthesisfrom α-halo ketones and β-dicarbonyl compounds, by carrying out the separation and characterization of the intermediates involved in the reaction. Additionally, a one-pot Feist–Benaryfuransynthesisfrom α-halo ketones and β-dicarbonyl compounds without any base or solvent
Guanidine derivatives and their use as neuropeptide ff receptor antagonists
申请人:Caroff Eva
公开号:US20060194788A1
公开(公告)日:2006-08-31
The invention relates to guanidine derivatives of formula (I) where: A represents a chain of 3-6 carbon atoms, one of which can be replaced by —N(R′)— or —O— and R′ is H or a substituent; the ring skeleton only contains both double bonds of the thiazole component; the pharmaceutically-acceptable acid addition salts of basic compounds of formula (I), the pharmaceutically-acceptable salts of compounds of formula (I), comprising acid groups, with bases, the pharmaceutically-acceptable esters of hydroxy or carboxyl group containing compounds of formula (I) and the solvates or hydrates thereof, which exhibit a neuropeptide FF receptor antagonist effect. The above are suitable for the treatment of pain and hyperalgesia, withdrawal symptoms in alcohol, psychotropic and nicotine dependencies, for improvement or cure of said dependencies, for regulation of insulin excretion, food intake, memory functions, blood pressure, electrolyte and energy management and for treatment of urinary incontinence. The above can be produced using generally used methods and processed to give medicaments.