Indium Triflate-Catalysed Addition of Thio Compounds to Camphene: A Novel Route to 2,3,3-Trimethyl-2-thiobicyclo[2.2.1]heptane Derivatives



InIII triflate-catalysed addition of thiols and thiocarboxylic acids to camphene under mild conditions has allowed the functionalisation of the alkene for the first time, with suppression of the classical rearrangement of the camphene terpene skeleton to isobornane structures. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)