“…[174] The authors reported as hort and divergent synthesis of diastereoisomer (+ +)-34 through stereospecific 1,3metal migration of iodine olivetol derivatives with alkyl derivatives of (S)-perillicacid (56;Scheme 21). [175] For arylation of olefins, the authors synthesized aryl iodide 59 through the iodation of 27 in the presence of KI, m-CPBA, and [18]crown-6 as at ransfer agent,f ollowedb yO -protection of 58 with CH 3 Ia nd K 2 CO 3 ,i n5 8% overall yield after the two steps.S eparately,t he methylation of 58 with LDA followed by the addition of Me 2 Sg ave the terpenic intermediate 59 In an alternative synthetic route, Vaillancourt and Albizati suggested using both the stereoselective substitution of bulky terpenic derivatives-mediated by organometallic speciesand ac hemoselective rearrangement under highly basic conditions as key reactions to form (À)-2 (Scheme 22) and its advancedintermediate( À)-34 (Scheme 23). [124] According to the authors, the chemo-and stereoselective synthesis of (À)-2 (Scheme 22) proceeded throughnucleophilic substitution of 3,9-dibromocamphor intermediate 28 [176,177] with homocuprate 54,w hich was obtained from 21,i n7 1% yield.…”