SAR Studies of 5-Aminopyrazole-4-carboxamide Analogues as Potent and Selective Inhibitors of Toxoplasma gondii CDPK1
摘要:
We previously discovered compounds based on a 5-aminopyrazole-4-carboxamide scaffold to be potent and selective inhibitors of CDPK1 from T. gondii. The current work, through structure-activity relationship studies, led to the discovery of compounds (34 and 35) with improved characteristics over the starting inhibitor 1 in terms of solubility, plasma exposure after oral administration in mice, or efficacy on parasite growth inhibition. Compounds 34 and 35 were further demonstrated to be more effective than 1 in a mouse infection model and markedly reduced the amount of T. gondii in the brain, spleen, and peritoneal fluid, and 35 given at 20 mg/kg eliminated T. gondii from the peritoneal fluid.
new twist: A one‐pot nitrous acid free, diazonium‐free, and transition‐metal‐free variation of the Fischer indole synthesis has been developed. Condensation of quinone monoketals and aliphatic hydrazine hydrochlorides afforded indoles via intermediate alkylaryldiazenes. This method will complement the classical Fischer indole synthesis by providing indoles in two steps from widely available phenols
Synthesis, biological evaluation, and structural studies on N1 and C5 substituted cycloalkyl analogues of the pyrazole class of CB1 and CB2 ligands
作者:Mathangi Krishnamurthy、Wei Li、Bob M Moore
DOI:10.1016/j.bmc.2003.10.045
日期:2004.1
A series of N1 and C5 substituted cycloalkyl and C5 4-methylphenyl analogues of the N-(piperidin-1-yl)-4-methyl-1H-pyrazole-3-carboxamide class of cannabinoid ligands were synthesized. The analogues were evaluated for CB1 and CB2 receptor binding affinities and receptor subtype selectivity. The effects of pyrazole substitution on ligand conformation and as such receptor affinities was not readily apparent;
Thienopyrazole Derivative Having PDE7 Inhibitory Activity
申请人:Inoue Hidekazu
公开号:US20090131413A1
公开(公告)日:2009-05-21
To provide thienopyrazole derivatives inhibiting PDE 7 selectively, and therefore, enhance cellular cAMP level. Consequently, the compound is useful for treating various kinds of disease such as allergic diseases, inflammatory diseases or immunologic diseases. The compound is thienopyrazole compound represented by the following formula (I):
[wherein, especially, R
1
is a cyclohexyl, a cycloheptyl group or a tetrahydropyranyl group; R
2
is methyl; R
3
is a hydrogen atom; and R
4
is a group: —CONR
5
R
6
(in which any one of R
5
and R
6
is a hydrogen atom)].
Thienopyrazole derivatives having PDE7 inhibitory activity
申请人:Daiichi Sankyo Company, Limited
公开号:EP2433943A1
公开(公告)日:2012-03-28
To provide thienopyrazole derivatives inhibiting PDE 7 selectively, and therefore, enhance cellular cAMP level. Consequently, the compound is useful for treating various kinds of disease such as allergic diseases, inflammatory diseases or immunologic diseases. The compound is thienopyrazole compound represented by the following formula (I):
[wherein, especially, R1 is a cyclohexyl, a cycloheptyl group or a tetrahydropyranyl group; R2 is methyl; R3 is a hydrogen atom; and R4 is a group: -CONR5R6 (in which any one of R5 and R6 is a hydrogen atom)].