Brønsted Acid Catalyzed Asymmetric Synthesis of cis-Tetrahydrocannabinoids

12 January 2023, Version 1
This content is a preprint and has not undergone peer review at the time of posting.


We report herein the catalytic asymmetric cyclization of 1-aryl terpenols to afford enantiomerically highly enriched cis-tetrahydrocannabinoid scaffolds in a single step. As powerful chiral catalysts strongly acidic imidodiphosphorimidates (IDPis) have been identified which furnish the products with good yields and excellent enantioselectivity. Upon MOM-deprotection some naturally occurring cannabimimetica such as (-)-cis-Δ9-tetrahydrocannabinol and ( )-perrotettinene as well as some unnatural analogues were made accessible along a merely 3-step biomimetic sequence.


Bronsted acid


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