Abstract |
Enantiopure tryptophanol is easily obtained from the reduction of its parent natural amino acid trypthophan (available from the chiral pool), and can be used as chiral auxiliary/inductor to control the stereochemical course of a diastereoselective reaction. Furthermore, enantiopure tryptophanol is useful for the syntheses of natural products or biological active molecules containing the aminoalcohol functionality. In this communication, we report the development of a small library of indolo[2,3-a] quinolizidines and evaluation of their activity as N-Methyl d-Aspartate ( NMDA) receptor antagonists. The indolo[2,3-a] quinolizidine scaffold was obtained using the following key steps: (i) a stereoselective cyclocondensation of (S)- or (R)- tryptophanol with appropriate racemic δ-oxoesters; (ii) a stereocontrolled cyclization on the indole nucleus. The synthesized enantiopure indolo[2,3-a] quinolizidines were evaluated as NMDA receptor antagonists and one compound was identified to be 2.9-fold more potent as NMDA receptor blocker than amantadine (used in the clinic for Parkinson's disease). This compound represents a hit compound for the development of novel NMDA receptor antagonists with potential applications in neurodegenerative disorders associated with overactivation of NMDA receptors.
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Authors | Nuno A L Pereira, Francesc X Sureda, Maria Pérez, Mercedes Amat, Maria M M Santos |
Journal | Molecules (Basel, Switzerland)
(Molecules)
Vol. 21
Issue 8
(Aug 06 2016)
ISSN: 1420-3049 [Electronic] Switzerland |
PMID | 27509489
(Publication Type: Journal Article)
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Chemical References |
- Indoles
- Quinolizidines
- Receptors, N-Methyl-D-Aspartate
- Small Molecule Libraries
- tryptophanol
- Tryptophan
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Topics |
- Cyclization
- Indoles
(chemical synthesis, chemistry, pharmacology)
- Molecular Structure
- Quinolizidines
(chemical synthesis, chemistry, pharmacology)
- Receptors, N-Methyl-D-Aspartate
(antagonists & inhibitors)
- Small Molecule Libraries
(chemical synthesis, chemistry, pharmacology)
- Stereoisomerism
- Tryptophan
(analogs & derivatives, chemistry)
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