Total synthesis of the tylophora alkaloids rusplinone, 13aα-secoantofine, and antofine using a multicatalytic oxidative aminochlorocarbonylation/Friedel–Crafts reaction
作者:Lisa M. Ambrosini、Tim A. Cernak、Tristan H. Lambert
DOI:10.1016/j.tet.2010.03.021
日期:2010.6
A rapid synthetic approach to the tylophora alkaloids antofine and 13aα-secoantofine is presented that makes use of a multicatalytic oxidative aminochlorocarbonylation/Friedel–Crafts reaction as the key step. This reaction, along with a one-pot, three-step telescoped process offers a three or four-pot sequence to access the title compounds in high overall yield.
A Unified Strategy for the Synthesis of Phenanthroizidine Alkaloids: Preparation of Sterically Congested Pyridines
作者:Marco A. Ciufolini、Frank Roschangar
DOI:10.1021/ja962757p
日期:1996.1.1
Total syntheses of the representative phenanthroizidine alkaloids, tylophorine and antofine, and of their seco congeners, septicine and julandine, have been completed from sterically congested 3,4-diarylpyridines prepared by a modified Knoevenagel-Stobbe synthesis. Central to the success of this effort was the ability of alpha-dicarbonyl enones to combine in a formal [4 + 2]-cycloaddition with sterically demanding vinyl ethers.