Syntheses of 5-thienyl and 5-furyl-substituted benzodiazepines: probes of the pharmacophore for benzodiazepine receptor agonists
摘要:
The synthesis of 5-thienyl- and 5-furyl-substituted benzodiazepines is described. These compounds were employed to probe the lipophilic pocket (L(3)) of the benzodiazepine receptor (BzR) and to determine the effect of occupation of L(3) on biological activity. Of the new analogs synthesized, the 5-(2-thienyl)-benzodiazepines 6a and 7a displayed high affinity for the BzR (IC50 28 and 18 nM, respectively) and exhibited both anticonvulsant (ED(50) approximate to 9 and 3 mg/kg) and muscle relaxant (ED(50) approximate to 10 and 7 mg/kg) activity. The 5-(3-thienyl)benzodiazepines 6d and 7d displayed only moderate affinity for the BzR (IC50 140 and 110 nM) and exhibited no biological activity (no anticonvulsant or muscle relaxant activity) at doses up to 40 mg/kg. The 5-(2-furyl)benzodiazepines (6b, 7b, 19b and 20b) exhibit low affinities for the BzR. These in vitro and in vivo findings are consistent with our model suggesting that pocket L(3) is very sensitive to lipophilic effects. Thus, decreasing the lipophilicity of functional groups which occupy this region decreases ligand affinity at BzR. The 2'-halogen (F or Cl) substituent of the 5-phenylbenzodiazepines increases ligand affinity in vitro because the active conformation of the phenyl N(4)=C(5)-C(1')=C(2') moiety is syn rather than anti. The syn conformation permits the 2'-halogen (F or Cl) atom to interact at the hydrogen bonding site H-2 and form a stable three-centered hydrogen bond in the proposed ligand binding cleft. The 3-thienyl and 2-furyl groups decrease the lipophilicity of the substituent which occupies L(3) but do not form a hydrogen bond at H-2, thus resulting in a diminished affinity at BzR.
[EN] NOVEL FUSED HETEROCYCLES AND USES THEREOF<br/>[FR] HETEROCYCLES FUSIONNES ET UTILISATIONS
申请人:ASTRAZENECA AB
公开号:WO2005111001A1
公开(公告)日:2005-11-24
This invention relates to novel compounds having the Formula (I) and to their pharmaceutical compositions and to their methods of use. These novel compounds provide a treatment or prophylaxis of H. pylori infection.
2-Arylindoles: A New Entry to Transition Metal-free Synthesis of 2-Aminobenzophenones
作者:Jin Yu、Hye Ran Moon、Beom Kyu Min、Jae Nyoung Kim
DOI:10.1002/bkcs.10796
日期:2016.6
Various 2‐aminobenzophenones were synthesized from readily available 2‐arylindoles in DMSO under O2 balloon atmosphere. The synthesis was carried out without the aid of a transition metal catalyst or moisture‐sensitive organometallic reagents from 2‐arylindoles.
The Synthesis of Substituted 2-Aminophenyl Heterocyclic Ketones
作者:R. I. Fryer、P. Zhang、R. Rios
DOI:10.1080/00397919308013295
日期:1993.4
Abstract The synthesis of substituted 2-aminophenyl heterocyclicketones, key intermediates to the preparation of 1,4-benzodiazepines has been achieved in one step and in good, yield from the corresponding anthranilic acid, by treatment with heterocyclic lithium reagents and chlorotrimethylsilane.
This invention relates to novel compounds having the Formula (I) and to their pharmaceutical compositions and to their methods of use. These novel compounds provide a treatment or prophylaxis of
H. pylori
infection.