Synthesis of (-)-Δ⁹-trans-Tetrahydrocannabinol:  Stereocontrol via Mo-Catalyzed Asymmetric Allylic Alkylation Reaction

[reaction: see text] Delta9-THC is synthesized in enantiomericaly pure form, where all of the stereochemistry is derived from the molybdenum-catalyzed asymmetric alkylation reaction of the extremely sterically congested bis-ortho-substituted cinnamyl carbonate in high regio- and enantioselectivity.