Difunctional allylic terpenes are important synthetic building blocks. Functionalization of protected geranyl derivatives by SeO2/t-BuO2H adsorbed on SiO2 provides a convenient route to such compounds. The chosen protecting groups clearly influence the oxidation process. Also, an efficient synthesis of 2-geranylphenol derivatives via a Cu(I)-mediated Grignard coupling of 2-lithiophenols and geranyl substrates was developed.
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