703-51-5Relevant academic research and scientific papers
Synthesis, SAR studies, and evaluation of 1,4-benzoxazepine derivatives as selective 5-HT1A receptor agonists with neuroprotective effect: Discovery of Piclozotan
Kamei, Katsuhide,Maeda, Noriko,Nomura, Kayoko,Shibata, Makoto,Katsuragi-Ogino, Ryoko,Koyama, Makoto,Nakajima, Mika,Inoue, Teruyoshi,Ohno, Tomochika,Tatsuoka, Toshio
, p. 1978 - 1992 (2007/10/03)
A new series of 1,4-benzoxazepine derivatives was designed, synthesized, and evaluated for binding to 5-HT1A receptor and cerebral anti-ischemic effect. A lot of compounds exhibited nanomolar affinity for 5-HT1A receptor with good selectivity over both dopamine D 2 and α1-adrenergic receptors. Among these compounds, 3-chloro-4-[4-[4-(2-pyridinyl)-1,2,3,6-tetrahydropyridin-1-yl]butyl]- 1, 4-benzoxazepin-5(4H)-one (50: SUN N4057 (Piclozotan) as 2HCl salt) showed remarkable neuroprotective activity in a transient middle cerebral artery occlusion (t-MCAO) model.
Effect of ring size or an additional heteroatom on the potency and selectivity of bicyclic benzylamine-type inhibitors of phenylethanolamine N- methyltransferase
Grunewald, Gary L.,Dahanukar, Vilas H.,Ching, Piao,Criscione, Kevin R.
, p. 3539 - 3546 (2007/10/03)
In the search for potent and selective inhibitors of the enzyme phenylethanolamine N-methyltransferase (PNMT; EC 2.1.1.28), we examined the effect of ring size or an additional heteroatom in the conformationally- restricted benzylamine-type PNMT inhibitors. Based on semiempirical calculations (MNDO) and molecular modeling studies, PNMT-inhibitory activity of these compounds seemed to be dependent on (a) the torsion angle between the plane of the aromatic ring and the endo N atom lone pair (τ2 angle), with the optimal value of τ2 being about -75°, and (b) the amount of steric bulk about the 3-position of 1,2,3,4-tetrahydroisoquinoline (5, THIQ). 2,3,4,5-Tetrahydro-1H-2-benzazepine (6) was found to have the highest selectivity (PNMT K(i) = 3.34 μM, α2 K(i) = 11 μM, selectivity = 3.2) as compared to other homologues of THIQ (PNMT K(i) = 9.67 μM, α2 K(i) = 0.35 μM, selectivity = 0.036). The higher PNMT-inhibitory activity of 6 was attributed to favorable steric interactions of the puckered methylene groups in the putative bioactive conformation of 6 at the PNMT active site, whereas unfavorable interactions of these puckered methylene groups at the α2- adrenoceptor were thought to be the cause of reduced α2 affinity of 6. No further enhancement of the selectivity of the benzazepine ring system could be obtained via introduction of a second heteroatom (N, O, S) at the 5- position in this ring system.
