A convenient synthesis of several tricyclic and bicyclic fluoro- and iodo analogs of cannabinoids has been reported. A new, mild methodology for the synthesis of vinyl fluorides from vinylstannanes has also been demonstrated. These C9 halo-functionalized cannabinoid analogs, along with (-) and (+)-DELTA9-THC carboxylic acids, were screened for anti-inflammatory activity in the mouse ear edema assay. It was interesting Lo find that both enantiomers of DELTA9-THC carboxylic acid were moderately active as anti-inflammatories. The bicyclic vinyl iodide (18C) also showed appreciable anti-inflammatory activity.
Synthesis of 5′-(2H3)-(−)-11-nor-9-carboxy-Δ9-tetrahydrocannabinol methyl ester methyl ether
作者:Marcus A. Tius、G.S.Kamali Kannangara
DOI:10.1016/s0040-4020(01)85608-8
日期:1992.1
A synthesis of 5′-(2H3)-(−)-11-nor-9-carboxy-Δ9-tetrahydrocannabinol methyl ester methylether (4) has been accomplished from α-bromoenone 10. The key steps are the stereocontrolled cyclobutane ring opening of the cuprate adduct 18 and the cyclization of the cyclohexenyl triflate 21 with excess iodotrimethylsilane to produce Δ9-cyclohexenyl triflate 22. An efficient, stereospecific synthesis of optically