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Synthetic Strategies for Rare Cannabinoids Derived from Cannabis sativa.

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Efficient syntheses of eight key cannabinoids were established and optimized. Predominant cannabinoids such as cannabigerol (CBG-C5) and cannabidiol (CBD-C5) were prepared from olivetol via regioselective condensation. Further treatments of CBD… Click to show full abstract

Efficient syntheses of eight key cannabinoids were established and optimized. Predominant cannabinoids such as cannabigerol (CBG-C5) and cannabidiol (CBD-C5) were prepared from olivetol via regioselective condensation. Further treatments of CBD led to Δ9-tetrahydrocannabinol (THC-C5), Δ8-iso-tetrahydrocannabinol (iso-THC-C5), and cannabinol (CBN-C5). Alternatively, a [3 + 3] annulation between olivetol and citral yielded the minor cannabinoid cannabichromene (CBC-C5), which was converted into two very rare polycycles, cannabicyclol (CBL-C5) and cannabicitran (CBT-C5), in a one-pot reaction. Finally, all eight syntheses were extended by utilizing resorcinol and two phenolic analogues, achieving a cannabinoid group with more than 30 compounds through a facile synthesis strategy.

Keywords: rare cannabinoids; cannabis sativa; strategies rare; cannabinoids derived; synthetic strategies; derived cannabis

Journal Title: Journal of natural products
Year Published: 2022

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