Total Syntheses of Aromatic Abietane Diterpenoids Utilizing Advances in the Pummerer Rearrangement
作者:Xin Li、Rich G. Carter
DOI:10.1021/acs.orglett.8b02060
日期:2018.9.21
The first total syntheses of triptobenzene T, vitexifolin C, 4-epi-triptobenzene L, triptobenzene L, and nepetaefolin F have been accomplished through an enantioselective, common intermediate approach and have enabled the confirmation and/or establishment of the absolute stereochemistry of each natural product synthesized. Application of three new and/or underutilized Pummerer reaction pathways proved
雷公藤苯T,vitexifolin C,4-表-雷公藤苯L,雷公藤苯L和荆芥油汀F的第一个总合成是通过对映选择性,常见的中间方法完成的,并且能够确认和/或确定每种天然物质的绝对立体化学。产品合成。三个新的和/或未充分利用的Pummerer反应途径的应用对合成工作至关重要。脯氨酸磺酰胺催化的Yamada–Otani反应用于进入高度官能化的环己烷A环核,包括C 10全碳四元立体中心。另外,显示了在C 4烷基化过程中A环不饱和度对于控制立体选择性的重要性。