Scope and applications of second generation palladium-catalyzed cycloalkenylation. Stereoselective total syntheses of isoiridomyrmecin, isodihydronepetalactone, and α-skytanthine
作者:Kazutaka Takeda、Masahiro Toyota
DOI:10.1016/j.tet.2011.08.078
日期:2011.12
Functionalized bicyclo[3.2.1]octanes, -oxabicyclo-[4.3.0]nonanes, 3-azabicyclo[3.3.0]octanes, and 3-azabicyclo[4.3.0]nonanes were easily synthesized via a second generation palladium-catalyzed cycloalkenylation. Isoiridomyrmecin and isodihydronepetalactone, both of which feature a 3-oxabicyclo[4.3.0]nonane subunit, were stereoselectively synthesized via a second generation palladium-catalyzed cycloalkenylation
Stereocontrolled Formation of Three Contiguous Stereogenic Centers by Free Radical Cyclization – Synthesis of (+)-Iridomyrmecin and (–)-Iso-iridomyrmecin – Formal Synthesis of δ-Skythantine
The absoluteconfigurations of C-8 Me groups in dehydro-iridodiol, neonepetalactone, and matatabiether isolated from the cat- and lacewmg-attracting plant ActinidiapolygamaMiq. were revised to the S configurations on the basis of chemical transformations and unambiguous syntheses.
Iridoid derivatives synthesized using genipin, which is an aglycon of geniposide, as the starting material are useful as an anti-hyperlipemia agent and as a cholagogue.