A study has been made of the semi-synthesis of 1, 3-diols (anacardic alcohols) from natural phenolic lipid resources from Anacardium occidentale and Anacardium giganteum which have given C15 and C11 derivatives, respectively. An isomeric 1, 3-diol (isoanacardic alcohol) has been obtained from cardanol separated from technical cashew nut-shell liquid. Homologous1, 3-diols have been synthesised from a range of synthetic 2-alkyl-, 3-alkyl- ...