Structure-activity relationships in prazosin-related compounds. 2. Role of the piperazine ring on .alpha.-blocking activity
摘要:
Several prazosin-related compounds have been synthesized and evaluated for their blocking activity toward a-adrenoreceptors. The structural modification performed on the prazosin structure included the replacement of the piperazine ring with 2,3-dialkylpiperazine or 1,2-cyclohexanediamine moieties to characterize a lipophilic binding pocket in the alpha1-adrenoreceptor surface. Cyclohexanediamine derivatives 3-6 were almost devoid of potency and selectivity, whereas dialkylpiperazine compounds 7-14 showed high affinity and selectivity toward alpha1-adrenoreceptors. The cis derivative 13 (cyclazosin) was the most potent and selective with an alpha1/alpha2 selectivity ratio value of 7800. The particular trend of antagonist activity within cis/trans stereoisomeric compounds not only supports the presence of a lipophilic binding area on alpha1-adrenoreceptor surface but also suggests that the lipophilic pocket is endowed with a well-defined size and spatial orientation. The most active compound of the series, 13, was tested also in vivo for antihypertensive activity on spontaneously hypertensive rats. It showed an interesting long-lasting hypotensive effect, very similar to that of doxazosin, which was statistically significant 12 h after oral administration.
[EN] DECAHYDROQUINOXALINE DERIVATIVES AND ANALOGS THEREOF<br/>[FR] DÉRIVÉS DE DÉCAHYDROQUINOXALINE ET LEURS ANALOGUES
申请人:OTSUKA PHARMA CO LTD
公开号:WO2013137479A1
公开(公告)日:2013-09-19
A heterocyclic compound represented by the general formula (1) or a salt thereof: wherein m, l, and n respectively represent an integer of 1 or 2; X represents -O- or -CH2-; R1 represents hydrogen, a lower alkyl group, a hydroxy-lower alkyl group, a protecting group, or a tri-lower alkylsilyloxy-lower alkyl group; R2 and R3, which are the same or different, each independently represent hydrogen or a lower alkyl group; or R2 and R3 are bonded to form a cyclo-C3-C8 alkyl group; and R4 represents an aromatic group or a heterocyclic group, wherein the aromatic or heterocyclic group may have one or more arbitrary substituent(s).
Iridium-Catalyzed Condensation of Amines and Vicinal Diols to Substituted Piperazines
作者:Linda L. R. Lorentz-Petersen、Lars Ulrik Nordstrøm、Robert Madsen
DOI:10.1002/ejoc.201201099
日期:2012.12
A straightforward procedure is described for the synthesis of piperazines from amines and 1,2-diols. The heterocyclization is catalyzed by [Cp*IrCl2]2 and sodium hydrogen carbonate and can be achieved with either toluene or water as solvent. The transformation does not require any stoichiometric additives and only produces water as the byproduct. The reaction can be performed between a 1,2-diamine
[EN] HETEROCYCLIC COMPOUNDS FOR TREATING OR PREVENTING DISORDERS CAUSED BY REDUCED NEUROTRANSMISSION OF SEROTONIN, NOREPHNEPHRINE OR DOPAMINE.<br/>[FR] COMPOSÉS HÉTÉROCYCLIQUES POUR LE TRAITEMENT OU LA PRÉVENTION DE TROUBLES PROVOQUÉS PAR UNE NEUROTRANSMISSION RÉDUITE DE LA SÉROTONINE, DE LA NORÉPINEPHRINE OU DE LA DOPAMINE
申请人:OTSUKA PHARMA CO LTD
公开号:WO2012036253A1
公开(公告)日:2012-03-22
A heterocyclic compound represented by the general formula (1) or a salt thereof: wherein m, l, and n respectively represent an integer of 1 or 2; X represents -O- or -CH2-; R1 represents hydrogen, a lower alkyl group, a hydroxy-lower alkyl group, a protecting group, or a tri-lower alkylsilyloxy-lower alkyl group; R2 and R3, which are the same or different, each independently represent hydrogen or a lower alkyl group; or R2 and R3 are bonded to form a cyclo-C3-C8 alkyl group; and R4 represents an aromatic group or a heterocyclic group, wherein the aromatic or heterocyclic group may have one or more arbitrary substituent(s).
A Bifunctional Pd/MgO Solid Catalyst for the One-Pot Selective N-Monoalkylation of Amines with Alcohols
作者:Avelino Corma、Tania Ródenas、MarÃaâ J. Sabater
DOI:10.1002/chem.200901501
日期:2010.1.4
the selective monoalkylation of amines with alcohols. The reaction goes through a series of consecutive steps in a cascade mode that involves: 1) the abstraction of hydrogen from the alcohol that produces the metal hydride and the carbonyl compound; 2) condensation of the carbonyl with the amine to give an imine, and 3) hydrogenation of the imine with the surface hydrogen atoms from the metal hydride
3-(5-AMINO-1-OXOISOINDOLIN-2-YL)PIPERIDINE-2,6-DIONE DERIVATIVES AND USES THEREOF
申请人:Novartis AG
公开号:US20200016143A1
公开(公告)日:2020-01-16
The present disclosure provides a compound of Formula (I′):
or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, wherein R
a
, R
b
, R
x
, R
1
, R
2
, X
2
, and q are as defined herein, and methods of making and using same.