Abstract
Earlier work from our laboratories has provided evidence for the existence of a subsite within the CB1 and CB2 cannabinoid receptor binding domain corresponding to substituents at the benzylic side chain position of classical cannabinoids. The existence and stereochemical features of this subsite have now been probed through the synthesis of a novel series of (-)-Delta(8)-tetrahydrocannabinol analogues bearing C1'-ring substituents. Of the compounds described here, those with C1'-dithiolane (1c), C1'-dioxolane (2d), and cyclopentyl (2a) substituents exhibited the highest affinities for CB1 and CB2. We used molecular modeling approaches to better define the stereochemical limits of the putative subsite. In vitro pharmacological testing found 1c to be a potent CB1 agonist.
Publication types
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Research Support, Non-U.S. Gov't
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Animals
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Binding Sites
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Cannabinoids / metabolism*
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Dronabinol / analogs & derivatives*
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Dronabinol / chemical synthesis*
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Dronabinol / pharmacology
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Electric Stimulation
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In Vitro Techniques
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Ligands
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Male
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Mice
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Models, Molecular
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Muscle Contraction / drug effects
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Muscle, Smooth / drug effects
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Muscle, Smooth / physiology
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Prosencephalon / metabolism
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Radioligand Assay
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Rats
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Receptor, Cannabinoid, CB2*
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Receptors, Cannabinoid
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Receptors, Drug / agonists*
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Spleen / metabolism
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Stereoisomerism
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Structure-Activity Relationship
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Vas Deferens / drug effects
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Vas Deferens / physiology
Substances
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Cannabinoids
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Cnr2 protein, rat
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Ligands
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Receptor, Cannabinoid, CB2
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Receptors, Cannabinoid
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Receptors, Drug
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Dronabinol