Crystal structure and quantum electronic analyses of pitrazepin, a γ-aminobutyric acid (GABA) receptor antagonist
- 1 January 1989
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 2
- No. 3,p. 217-221
- https://doi.org/10.1039/p29890000217
Abstract
The crystal structure of pitrazepin has been solved by direct methods from single-crystal X-ray diffraction data and refined by full-matrix least squares: monoclinic, space group P21/c, a= 18.845(2), b= 15.424(5), c= 16.950(4)Å, β= 104.51(2)°, Z= 4, two pitrazepin and three water molecules per asymmetric unit, final R factor is 0.042. This compound binds with high affinity to pharmacological GABA-A receptors; it acts as an antagonist. Ab initio molecular orbital calculations for pitrazepin and GABA show that the piperazine and triazole rings of pitrazepin might be considered as the GABA-mimetic moieties.Keywords
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