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Current Medicinal Chemistry

Editor-in-Chief

ISSN (Print): 0929-8673
ISSN (Online): 1875-533X

2(3H)-Benzoxazolone and Bioisosters as “Privileged Scaffold” in the Design of Pharmacological Probes

Author(s): Jacques Poupaert, Pascal Carato and Evelina Colacino

Volume 12, Issue 7, 2005

Page: [877 - 885] Pages: 9

DOI: 10.2174/0929867053507388

Price: $65

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Abstract

The 2(3H)-benzoxazolone heterocycle and its bioisosteric surrogates (such as 2(3H)-benzothiazolinone, benzoxazinone, etc.) have received considerable attention from the medicinal chemists owing to their capacity to mimic a phenol or a catechol moiety in a metabolically stable template. These heterocycles and pyrocatechol have indeed similar pKas, electronic charge distribution, and chemical reactivity. Therapeutic applications of this template are very broad, and range from analgesic anti-inflammatory compounds (including PPAR-gamma antagonists) to antipsychotic and neuroprotective anticonvulsant compounds. High affinity ligands have been obtained also for dopaminergic (D2 and D4), serotoninergic (5-HT1A and 5-HT-2A), sigma-1 and sigma-2 receptors. Owing to the high number of positive hits encountered with this heterocycle and its congeners, 2(3H)- benzoxazolone template certainly deserves the title of “privileged scaffold” in medicinal chemistry.

Keywords: bioisosterism, privileged scaffolds, 2(3h)-benzoxazolone, 2(3h)-benzothiazolinone, mixed affinity ligands

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