Reinvestigating Old Pharmacophores: Are 4-Aminoquinolines and Tetraoxanes Potential Two-Stage Antimalarials?
摘要:
The syntheses and antiplasmodial activities of various substituted aminoquinolines coupled to an adamantane carrier are described. The compounds exhibited pronounced in vitro and in vivo activity against Plasmodium berghei in the Thompson test. Tethering a fluorine atom to the aminoquinoline C(3) position afforded fluoroaminoquinolines that act as intrahepatocytic parasite inhibitors, with compound 25 having an IC50 = 0.31 mu M and reducing the liver load in mice by up to 92% at 80 mg/kg dose. Screening our peroxides as inhibitors of liver stage infection revealed that the tetraoxane pharmacophore itself is also an excellent liver stage P. berghei inhibitor (78: IC50 = 0.33 mu M). Up to 91% reduction of the parasite liver load in mice was achieved at 100 mg/kg. Examination of tetraoxane 78 against the transgenic 3D7 strain expressing luciferase under a gametocyte-specific promoter revealed its activity against stage IV-V Plasmodium falciparum gametocytes (IC50 = 1.16 +/- 0.37 mu M). To the best of our knowledge, compounds 25 and 78 are the first examples of either an 4-aminoquinoline or a tetraoxane liver stage inhibitors.
Compounds of formula I:
are antagonists of the human 5-HT
2A
receptor, and hence useful in treatment or prevention of a variety of neurological conditions.
式I的化合物:是人类5-HT2A受体的拮抗剂,因此在治疗或预防各种神经系统疾病方面很有用。
5-HT2A receptor ligands
申请人:Merk Sharp & Dohme Ltd.
公开号:US07094777B2
公开(公告)日:2006-08-22
Compounds of formula I:
are antagonists of the human 5-HT2A receptor, and hence useful in treatment or prevention of a variety of neurological conditions.
化学式为I的化合物是人类5-HT2A受体的拮抗剂,因此在治疗或预防各种神经系统疾病方面非常有用。
NOVEL 1, 3-DISUBSTITUTED AZETIDINE DERIVATIVES FOR USE AS 5HT2A RECEPTOR LIGANDS
申请人:Merck Sharp & Dohme Limited
公开号:EP1685100A1
公开(公告)日:2006-08-02
US7094777B2
申请人:——
公开号:US7094777B2
公开(公告)日:2006-08-22
[EN] NOVEL 1, 3-DISUBSTITUTED AZETIDINE DEIVATIVES FOR USE AS 5HT2A RECEPTOR LIGANDS<br/>[FR] NOUVEAUX DERIVES D'AZETIDINE 1, 3-DISUBSTITUEE, SERVANT DE LIGANDS AU RECEPTEUR 5HT2A
申请人:MERCK SHARP & DOHME
公开号:WO2005047246A1
公开(公告)日:2005-05-26
Compounds of formula (I): are antagonists of the human 5-HT2A receptor, and hence useful in treatment or prevention of a variety of neurological conditions.