Biomimetic Synthesis of Petuniasterone D via the Epoxy Ester−Ortho Ester Rearrangement
作者:Juan A. Faraldos、José-Luis Giner
DOI:10.1021/jo020068s
日期:2002.7.1
The side chain of the insecticidal steroid petuniasterone D was synthesized by the biomimetic acid-catalyzed epoxy ester[bond]ortho ester rearrangement. In addition to the natural (22R,24R)-configuration of the side chain ortho ester, compounds bearing the epimeric (22R,24S)-, (22S,24R)-, and (22S,24S)- [3.2.1]-bicyclic ortho esters were also produced by stereospecific rearrangement of the corresponding
通过仿生酸催化环氧酯原酸酯重排合成了杀虫类固醇petuniasterone D的侧链。除了侧链原酸酯的天然(22R,24R)-构型外,带有差向异构体(22R,24S)-,(22S,24R)-和(22S,24S)-[3.2.1]-的化合物双环原酸酯也通过相应异构体环氧酯的立体定向重排而产生。(22R,24R)原酸酯类固醇核的功能化完成了天然产物的合成。