Stereoselective synthesis of novel 2′-(S)-CCG-IV analogues as potent NMDA receptor agonists

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We developed a versatile stereoselective route for the synthesis of new 2′-(S)-CCG-IV analogues. The route allows for late stage diversification and thereby provides access to a great variety of conformationally restricted cyclopropyl glutamate analogues. A selection of the 2′-(S)-CCG-IV analogues were evaluated using two-electrode voltage-clamp electrophysiology at recombinant GluN1/GluN2A-D receptors, demonstrating that agonists can be developed with GluN2 subunit-dependent potency and agonist efficacy. We also describe a crystal structure of the GluN2A agonist binding domain in complex with 2′-butyl-(S)-CCG-IV that determines the position of 2′-substituents in (S)-CCG-IV agonists in the glutamate binding site and provides further insight to the structural determinants of their agonist efficacy. The stereoselective synthesis described here enables versatile and straight-forward modifications to diverse analogues of interest for the development of potent subtype-specific NMDA receptor agonists and other applications.

Original languageEnglish
Article number113099
JournalEuropean Journal of Medicinal Chemistry
Number of pages17
Publication statusPublished - 2021

    Research areas

  • (carboxycyclopropyl)glycine, NMDA, Synthesis, X-ray crystallography

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