Stereochemical requirements for cannabinoid activity

Abstract
Several pairs of cannabinoid isomers were synthesized and tested for pyschotropic activity in rhesus monkeys. Two regularities were observed: In the absence of the other substitutents, the equatorial stereochemistry of the substituent at C-1 determines activity. Groups (2) of .DELTA.9-Tetrahydrocannabinol type cannabinoids which differ only in that the chemical groupings in 1 of them at C-1, C-2 are situated at C-1, C-6 in the other (but retain their stereochemistry) have almost equivalent pyschotropic activity.