[A new synthesis of delta 9-tetrahydrocannabinol]

The authors effected the synthesis of delta9-tetrahydrocannabinol (delta9-THC) by first preparing the raw materials: olivetol and p-menthadiene-2.8 ol-1. Then these two reactants were put into contact in the presence of p-toluene sulphonic acid to give the isomer delta8-THC which was converted into the isomer delta9-THC.