Benzimidazoles: Novel Mycobacterial Gyrase Inhibitors from Scaffold Morphing
摘要:
Type II topoisomerases are well conserved across the bacterial species, and inhibition of DNA gyrase by fluoroquinolones has provided an attractive option for treatment of tuberculosis (TB). However, the emergence of fluoroquinolone-resistant strains of Mycobacterium tuberculosis (Mtb) poses a threat for its sustainability. A scaffold hopping approach using the binding mode of novel bacterial topoisomerase inhibitors (NBTIs) led to the identification of a novel class of benzimidazoles as DNA gyrase inhibitors with potent anti-TB activity. Docking of benzimidazoles to a NBTI bound crystal structure suggested that this class of compound makes key contacts in the enzyme active site similar to the reported NBTIs. This observation was further confirmed through the measurement of DNA gyrase inhibition, and activity against Mtb strains harboring mutations that confer resistance to aminopiperidines based NBTIs and Mtb strains resistant to moxifloxacin. Structure activity relationship modification at the C-7 position of the left-hand side ring provided further avenue to improve hERG selectivity for this chemical series that has been the major challenges for NBTIs.
Novel N-Linked Aminopiperidine-Based Gyrase Inhibitors with Improved hERG and in Vivo Efficacy against <i>Mycobacterium tuberculosis</i>
作者:Shahul Hameed P、Vikas Patil、Suresh Solapure、Umender Sharma、Prashanti Madhavapeddi、Anandkumar Raichurkar、Murugan Chinnapattu、Praveena Manjrekar、Gajanan Shanbhag、Jayashree Puttur、Vikas Shinde、Sreenivasaiah Menasinakai、Suresh Rudrapatana、Vijayashree Achar、Disha Awasthy、Radha Nandishaiah、Vaishali Humnabadkar、Anirban Ghosh、Chandan Narayan、V. K. Ramya、Parvinder Kaur、Sreevalli Sharma、Jim Werngren、Sven Hoffner、Vijender Panduga、C. N. Naveen Kumar、Jitendar Reddy、Mahesh Kumar KN、Samit Ganguly、Sowmya Bharath、Ugarkar Bheemarao、Kakoli Mukherjee、Uma Arora、Sheshagiri Gaonkar、Michelle Coulson、David Waterson、Vasan K. Sambandamurthy、Sunita M. de Sousa
DOI:10.1021/jm500432n
日期:2014.6.12
value. We describe a novel class of N-linked aminopiperidinyl alkyl quinolones and naphthyridones that kills Mtb by inhibiting the DNA gyrase activity. The mechanism of inhibition of DNA gyrase was distinct from the fluoroquinolones, as shown by their ability to inhibit the growth of fluoroquinolone-resistant Mtb. Biochemical studies demonstrated this class to exert its action via single-strand cleavage
A cyclopropane compound represented by the following formula (A) or a pharmaceutically acceptable salt thereof has orexin receptor antagonism, and therefore has a potencial of usefulness for the treatment of sleep disorder for which orexin receptor antagonism is effective, for example, insomnia:
wherein Q represents —CH— or a nitrogen atom, R
1a
and R
1b
each independently represent a C
1-6
alkyl group and the like, R
1c
represents a hydrogen atom and the like, R
2a
, R
2b
, R
2c
and R
2d
each independently represent a hydrogen atom, a halogen atom, a C
1-6
alkyl group and the like, R
3a
, R
3b
and R
3c
each independently represent a hydrogen atom, a halogen atom and the like, and R
3d
represents a hydrogen atom and the like.
HETERO RING-FUSED IMIDAZOLE DERIVATIVE HAVING AMPK ACTIVATING EFFECT
申请人:Tonogaki Keisuke
公开号:US20130184240A1
公开(公告)日:2013-07-18
Disclosed is a compound which is useful as an AMPK activator. A compound represented by the formula:
its pharmaceutically acceptable salt, or a solvate thereof,
wherein
a group represented by the formula:
is a group represented by the formula:
R
1
is each independently halogen, hydroxy, cyano, nitro, carboxy, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl or the like;
m is an integer of 0 to 3;
R
2
is hydrogen, or substituted or unsubstituted alkyl;
X is —O—; and
Y is substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl.