Synthesis of pyrrolizidine alkaloids, (±)-trachelanthamidine, (±)-isoretronecanol, and (±)-supinidine, by means of an intramolecular carbenoid displacement (ICD) reaction
作者:Tetsuji Kametani、Hirotaka Yukawa、Toshio Honda
DOI:10.1039/c39860000651
日期:——
The syntheses of pyrrolizidinealkaloids, (±)-trachelanthamidine, (±)-isoretronecanol, and (±)-supinidine were achieved via a carbon–carbon bond formation at the α-position to the nitrogen by employing an intramolecular carbenoiddisplacement (ICD) reaction as a key step.
N-Unsubstituted imides react with 1-carboethoxycyclopropyltriphenylphosphonium tetrafluoroborate to yield N-acyl-Δ2-pyrroline, pyrrolizidine, and indolizidine derivatives.