Towards the Sarpagine‐Ajmaline‐Macroline Family of Indole Alkaloids: Enantioselective Synthesis of an
<i>N</i>
‐Demethyl Alstolactone Diastereomer
作者:Dylan Dagoneau、Qian Wang、Jieping Zhu
DOI:10.1002/chem.202000415
日期:2020.4.9
primary alcohol with acetoacetic acid followed by intramolecular Michael addition afforded the desired tetracycle with an excellent diastereoselectivity. Subsequent functional group manipulation and transannular cyclization of the aminoalcohol afforded the N(1)-demethyl-3,5-diepi-alstolactone. We believe that the same synthetic route would afford the alstolactone should the aminoalcohol with appropriate
Abstract Structurally varied vicinal dibromides have been synthesized in high yield and good purity through highly stereoselective anti‐addition of bromine across the olefinic linkages using dioxanedibromide (DD) under solvent‐free conditions.