Synthesis and structure-activity relationship of substitutions at the C-1 position of Delta9-tetrahydrocannabinol.

A novel series of Delta9-tetrahydrocannabinol (Delta9-THC) analogues were synthesized to determine their potential as cannabinoid receptor modulators. Chemistry focused on conversion of the phenol of Delta9-THC to other functionality through palladium catalyzed reactions with an intermediate triflate 2. Two analogues with sub 100 nM affinity for the CB1 and CB2 receptors were identified.