Optically active compounds having plural chiral centers and the production thereof

摘要

Optically active compounds, having a plurality of chiral centres, have the general formulae: in which R<1>, R<2> and R<4> are the same or are different and each is an alkyl, alkenyl or alkynyl group having up to 40 carbon atoms, the carbon chain of which may contain one or more of halogen, cyano, oxygen, nitrogen, silicon, sulfur and substituted or unsubstituted benzene, cyclohexane, pyridine, pyrimidine, pyridazine, pyrazine, dioxane or bicyclooctane ring 5; R<3> is an alkyl, alkenyl or alkynyl groups having 3 to 40 carbon atoms ; X is hydrogen or an alkanoyl group having 2 to 40 carbon atoms; and the carbon atom with the sign, *, is an asymmetic carbon.