3904-24-3Relevant academic research and scientific papers
Intensification of Free-Radical Racemization for a Non-activated Amine in a Continuous Flow Reactor
Toussaint, Frédéric C.,Defrance, Thierry,Decouvreur, Serge,Carly, Nicolas,Merschaert, Alain
, p. 3389 - 3396 (2020/11/03)
The free-radical racemization of non-activated amines is a powerful tool for process design in the pharmaceutical industry, allowing the recycling of undesired enantiomers after chiral separation. This paper describes the development of the free-radical racemization of a key API intermediate in a continuous flow reactor. Upon development, a significant reduction of the solvent usage and radical initiator was made possible thanks to the conversion into a continuous flow mode. This intensification positively impacted both the environmental footprint and the safety of the reaction as well as maintaining satisfactory productivity.
COMPOSITIONS AND METHODS FOR TREATMENT OF NEUROLOGIC DISEASES
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Paragraph 0097, (2013/12/03)
Provided are compounds, pharmaceutical acceptable salts, polymorphs, solvates, enantiomers, stereoisomers and hydrates thereof. The pharmaceutical compositions comprising the compounds may be formulated for oral, buccal, rectal, topical, transdermal, transmucosal, intravenous, parenteral administration, syrup or injection, and may be used for the treatment of neurologic diseases, such as depression, Alzheimer's disease, multiple sclerosis, Batten disease, Parkinson's disease and restless legs syndrome.
Novel Process for the Preparation of Nitrogen Substituted Aminotetralins Derivatives
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Paragraph 0238, (2013/05/08)
The present invention provides an alternative synthesis of N-substituted aminotetralines comprising resolution of N-substituted aminotetralins of formula (II), wherein R1, R2 and R3 are as defined for compound of formula (I).
NOVEL PROCESS FOR THE PREPARATION OF NITROGEN SUBSTITUTED AMINOTETRALINS DERIVATIVES
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Page/Page column 33, (2012/01/13)
The present invention provides an alternative synthesis of N-substituted aminotetralines comprising resolution of N-substituted aminotetralins of formula (II), wherein R1, R2 and R3 are as defined for compound of formula (I).
Discovery of 4-(4-(2-((5-Hydroxy-1,2,3,4-tetrahydronaphthalen-2-yl)(propyl) amino)ethyl)piperazin-1-yl)quinolin-8-ol and its analogues as highly potent dopamine D2/D3 agonists and as iron chelator: In vivo activity indicates potential application in symptomatic and neuroprotective therapy for Parkinson's disease
Ghoshs, Balaram,Antonio, Tamara,Reith, Maarten E. A.,Dutta, Aloke K.
experimental part, p. 2114 - 2125 (2010/08/20)
The role of iron in the pathogenesis of Parkinson's disease (PD) has been implicated strongly because of generation of oxidative stress leading to dopamine cell death. In our overall goal to develop bifunctional/multifunctional drugs, we designed dopamine D2/D3 agonist molecules with a capacity to bind to iron. Binding assays were carried out with HEK-293 cells expressing either D2 or D3 receptor with tritiated spiperone to evaluate inhibition constants (K i). Functional activity of selected compounds was carried out with GTPyS binding assay. SAR results identified compounds (+)-19a and (-)-19b as two potent agonists for both D2 and D3 receptors (EC50 (GTPyS); D2 = 4.51 and 1.69 nM and D3 = 1.58 and 0.74 nM for (-)-19b and (+)-19a, respectively). In vitro complexation studies with 19b demonstrated efficient chelation with iron. Furthermore, the deoxyribose assay with 19b demonstrated potent antioxidant activity. In PD animal model study, (-)-19b exhibited potent in vivo activity in reversing locomotor activity in reserpinized rats and also in producing potent rotational activity in 6-OHDA lesioned rats. This reports initial development of unique lead molecules that might find potential use in symptomatic and neuroprotective treatment of PD.
Further delineation of hydrophobic binding sites in dopamine D 2/D3 receptors for N-4 substituents on the piperazine ring of the hybrid template 5/7-{[2-(4-aryl-piperazin-1-yl)-ethyl]-propyl-amino}-5, 6,7,8-tetrahydro-naphthalen-2-ol
Ghosh, Balaram,Antonio, Tamara,Gopishetty, Bhaskar,Reith, Maarten,Dutta, Aloke
experimental part, p. 5661 - 5674 (2010/10/01)
Here we report a structure-activity relationship (SAR) study of analogues of 5/7-{[2-(4-aryl-piperazin-1-yl)-ethyl]-propyl-amino}-5,6,7,8-tetrahydro- naphthalen-2-ol. Our SAR is focused on introduction of various substitutions in the piperazine ring of the hybrid template. The goal behind this study is to delineate the nature of the binding pocket for N-aryl substitution in the piperazine ring by observing the effect of various hydrophobic and other heteroaromatic substitutions on binding affinity (Ki), as measured with tritiated spiperone and HEK-293 cells expressing either D2 or D3 receptors. Functional activity of selected compounds was assessed with the GTPγS binding assay. Compound 8d was the most selective for the D3 receptor in the spiperone binding assay. An interesting similarity in binding affinity was observed between isoquinoline derivative D-301 and the 2-substituted pyridine derivative 8d, suggesting the importance of relative spatial relationships between the N-atom of the ligand and the molecular determinants of the binding pocket in D2/D3 receptors. Functional activity assays demonstrated high potency and selectivity of (+)-8a and (-)-28b (D2/D3 (ratio of EC50): 105 and 202, respectively) for the D3 receptor and both compounds were more selective compared to the reference drug ropinirole (D2/D3 (ratio of EC50): 29.5).
