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.
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.
Novel p53 Inactivators with Neuroprotective Action: Syntheses and Pharmacological Evaluation of 2-Imino-2,3,4,5,6,7-hexahydrobenzothiazole and 2-Imino-2,3,4,5,6,7-hexahydrobenzoxazole Derivatives
作者:Xiaoxiang Zhu、Qian-sheng Yu、Roy G. Cutler、Carsten W. Culmsee、Harold W. Holloway、Debomoy K. Lahiri、Mark P. Mattson、Nigel H. Greig
DOI:10.1021/jm020044d
日期:2002.11.1
feature of several neurodegenerative disorders, including Alzheimer's disease, 2 and novel analogues (3-16) were synthesized to (i) assess the value of tetrahydrobenzothiazole analogues as neuroprotective agents and (ii) define the structuralrequirements for p53 inactivation. Not only did 2 exhibit neuroprotective activity in both tissue culture and in vivo stroke models but also compounds 6, 7, 10, 13
4-(5-Membered fused pyridinyl)benzamides as BTK-inhibitors
申请人:MSD Oss B.V.
公开号:EP2548877A1
公开(公告)日:2013-01-23
The present invention provides 6-5 membered fused pyridine ring compounds according to Formula I or pharmaceutically acceptable salts thereof.
or a pharmaceutically acceptable salt thereof or to pharmaceutical compositions comprising these compounds and to their use in therapy. In particular, the present invention relates to the use of 6-5 membered fused pyridine ring compounds in the treatment of Bruton's Tyrosine Kinase (Btk) mediated disorders.
The present invention is related to compounds of structure (I) as heme oxygenase 1 (HMOX 1) inducers.
The present invention is also related a method of controlling the activity or the amount, or both the activity and the amount, of heme-oxygenase 1 in a mammalian subject. The definitions of the variables are provided herein.
Antiulcer thiazol-2-ylcarbamoyl-carboxylic acids, esters and amides
申请人:Pfizer Inc.
公开号:US04321372A1
公开(公告)日:1982-03-23
This invention encompasses orally effective antiulcer agents of the formula ##STR1## wherein X is hydroxy, (C.sub.1 -C.sub.5)-alkoxy, phenoxy, benzyloxy, or --NH(CH.sub.2).sub.n Y wherein n is an integer of value 2 to 4 and Y is di-(C.sub.1 -C.sub.3)-alkylamino, 1-pyrrolidinyl, 1-piperidinyl or 4-morpholinyl; R' and R" when taken together are (C.sub.3 -C.sub.8)-alkylene, with the proviso that the ring so formed is 5- to 8-membered; R' and R" when taken separately are each independently hydrogen, (C.sub.1 -C.sub.6)-alkyl or (C.sub.5 -C.sub.6)-cycloalkyl, with the proviso that when X is other than --NH(CH.sub.2).sub.n Y, at least one of R' and R" is other than hydrogen; the pharmaceutically acceptable cationic salts thereof when X is hydroxyl, and the pharmaceutically acceptable anionic salts thereof when X is --NH(CH.sub.2).sub.n Y.
这项发明涵盖了以下结构的口服抗溃疡药物:##STR1## 其中 X 是羟基、(C.sub.1 -C.sub.5)-烷氧基、苯氧基、苄氧基,或--NH(CH.sub.2).sub.n Y,其中 n 是值为 2 到 4 的整数,Y 是双-(C.sub.1 -C.sub.3)-烷基氨基、1-吡咯啉基、1-哌啶基或 4-吗啉基;当 R' 和 R" 结合在一起时为 (C.sub.3 -C.sub.8)-烷基烯,但所形成的环为 5 至 8 个成员;当 R' 和 R" 分别取时,它们各自独立地是氢、(C.sub.1 -C.sub.6)-烷基或 (C.sub.5 -C.sub.6)-环烷基,但当 X 不是 --NH(CH.sub.2).sub.n Y 时,R' 和 R" 中至少有一个不是氢。当 X 是羟基时,其在药学上可接受的阳离子盐,当 X 是 --NH(CH.sub.2).sub.n Y 时,其在药学上可接受的阴离子盐。
Heterocylic Studies. Synthesis of 9-Hydroxybenzimidazo[2,1-<i>b</i>]benzothiazoles and Their Quaternary Derivatives
作者:R. P. Soni、J. P. Saxena
DOI:10.1246/bcsj.55.1681
日期:1982.5
A series of substituted 9-hydroxybenzimidazo[2,1-b]benzothiazoles has been synthesized. The position of phenolic hydroxyl group in these compounds has been ascertained on the basis of spectral data.