The evaluation of the chiral composition of phytocannabinoids in the cannabis plant is particularly important as the pharmacological effects of the (+) and (-) enantiomers of these compounds are completely different. Chromatographic attempts to assess the presence of the minor (+) enantiomers of the main phytocannabinoids, cannabidiolic acid (CBDA) and trans-Δ9-tetrahydrocannabinolic acid (trans-Δ9-THCA), were carried out on heated plant extracts for the determination of the corresponding decarboxylated species, cannabidiol (CBD) and trans-Δ9-tetrahydrocannabinol (trans-Δ9-THC), respectively. This process produces an altered phytocannabinoid composition with several new and unknown decomposition products. The present work reports for the first time the stereoselective synthesis of the pure (+) enantiomers of the main phytocannabinoids, trans-CBDA, trans-Δ9-THCA, trans-CBD and trans-Δ9-THC, and the development and optimization of an achiral-chiral liquid chromatography method coupled to UV and high-resolution mass spectrometry detection in reversed phase conditions (RP-HPLC-UV-HRMS) for the isolation of the single compounds and evaluation of their actual enantiomeric composition in plant. The isolation of the peaks with the achiral stationary phase ensured the absence of interferences that could potentially co-elute with the analytes of interest in the chiral analysis. The method applied to the Italian medicinal cannabis variety FM2 revealed no trace of the (+) enantiomers for all phytocannabinoids under investigation before and after decarboxylation, thus suggesting that the extraction procedure does not lead to an inversion of configuration.

Enantioseparation of chiral phytocannabinoids in medicinal cannabis / Russo, Fabiana; Tolomeo, Francesco; Vandelli, Maria Angela; Biagini, Giuseppe; Laganà, Aldo; Laura Capriotti, Anna; Cerrato, Andrea; Carbone, Luigi; Perrone, Elisabetta; Cavazzini, Alberto; Maiorano, Vincenzo; Gigli, Giuseppe; Cannazza, Giuseppe; Citti, Cinzia. - In: JOURNAL OF CHROMATOGRAPHY. B. - ISSN 1570-0232. - 1221:(2023), pp. 1-10. [10.1016/j.jchromb.2023.123682]

Enantioseparation of chiral phytocannabinoids in medicinal cannabis

Fabiana Russo;Maria Angela Vandelli;Giuseppe Biagini;Giuseppe Cannazza
;
Cinzia Citti
2023

Abstract

The evaluation of the chiral composition of phytocannabinoids in the cannabis plant is particularly important as the pharmacological effects of the (+) and (-) enantiomers of these compounds are completely different. Chromatographic attempts to assess the presence of the minor (+) enantiomers of the main phytocannabinoids, cannabidiolic acid (CBDA) and trans-Δ9-tetrahydrocannabinolic acid (trans-Δ9-THCA), were carried out on heated plant extracts for the determination of the corresponding decarboxylated species, cannabidiol (CBD) and trans-Δ9-tetrahydrocannabinol (trans-Δ9-THC), respectively. This process produces an altered phytocannabinoid composition with several new and unknown decomposition products. The present work reports for the first time the stereoselective synthesis of the pure (+) enantiomers of the main phytocannabinoids, trans-CBDA, trans-Δ9-THCA, trans-CBD and trans-Δ9-THC, and the development and optimization of an achiral-chiral liquid chromatography method coupled to UV and high-resolution mass spectrometry detection in reversed phase conditions (RP-HPLC-UV-HRMS) for the isolation of the single compounds and evaluation of their actual enantiomeric composition in plant. The isolation of the peaks with the achiral stationary phase ensured the absence of interferences that could potentially co-elute with the analytes of interest in the chiral analysis. The method applied to the Italian medicinal cannabis variety FM2 revealed no trace of the (+) enantiomers for all phytocannabinoids under investigation before and after decarboxylation, thus suggesting that the extraction procedure does not lead to an inversion of configuration.
2023
21-mar-2023
1221
1
10
Enantioseparation of chiral phytocannabinoids in medicinal cannabis / Russo, Fabiana; Tolomeo, Francesco; Vandelli, Maria Angela; Biagini, Giuseppe; Laganà, Aldo; Laura Capriotti, Anna; Cerrato, Andrea; Carbone, Luigi; Perrone, Elisabetta; Cavazzini, Alberto; Maiorano, Vincenzo; Gigli, Giuseppe; Cannazza, Giuseppe; Citti, Cinzia. - In: JOURNAL OF CHROMATOGRAPHY. B. - ISSN 1570-0232. - 1221:(2023), pp. 1-10. [10.1016/j.jchromb.2023.123682]
Russo, Fabiana; Tolomeo, Francesco; Vandelli, Maria Angela; Biagini, Giuseppe; Laganà, Aldo; Laura Capriotti, Anna; Cerrato, Andrea; Carbone, Luigi; Perrone, Elisabetta; Cavazzini, Alberto; Maiorano, Vincenzo; Gigli, Giuseppe; Cannazza, Giuseppe; Citti, Cinzia
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1299647
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