Enantioselective syntheses of the unique, insect-derived spiroacetal, (2S,4R,6R,8S)-2,4,8-trimethyl-1,7-dioxaspiro[5.5]undecane and some diastereomers, utilising (R)-(+)-pulegone as chiral source-material, and asymmetric dihydroxylation as a key step, are described.
利用(R)-(+),由昆虫衍生的独特螺
缩醛(2S,4R,6R,8S)-2,4,8-三甲基-1,7-二氧杂螺[5.5]
十一烷和一些非对映异构体的对映选择性合成描述了以手性原料为原料的-pulegone,以关键步骤为不对称二羟基化反应。