62592-80-7Relevant academic research and scientific papers
Synthesis of Highly Functionalized Hydrindanes via Sequential Organocatalytic Michael/Mukaiyama Aldol Addition and Telescoped Hydrozirconation/Cross-Coupling as Key Steps: En Route to the AB System of Clifednamides
Sinast, Moritz,Claasen, Birgit,St?ckl, Yannick,Greulich, Andreas,Zens, Anna,Baro, Angelika,Laschat, Sabine
supporting information, p. 7537 - 7551 (2021/06/25)
The AB ring systems of the clifednamide family, polycyclic tetramate macrolactames (PoTeMs), were prepared by a new, convergent approach employing an intramolecular Diels-Alder (IMDA) reaction. Key steps comprise an organocatalytic Michael addition (>90% enantiomeric excess (ee)), a Mukaiyama aldol reaction for the convergent installation of a diene moiety, and a telescoped hydrozirconation/cross-coupling grafting an enone. The following IMDA furnished a highly functionalized hydrindane (diastereomeric ratio (dr) = 91:1) with the same configuration as the clifednamide scaffold. Advantages of this route are only one required protecting group, 13% overall yield over 9 steps (reduced from previously 17 steps/1.3% overall), and the potential access to the key intermediates in the clifednamide biosynthesis.
Synthesis of (±)-oleocanthal via a tandem intramolecular Michael cyclization-HWE olefination
English, Brandon J.,Williams, Robert M.
experimental part, p. 2713 - 2715 (2009/09/06)
A synthesis of racemic oleocanthal has been accomplished in 11 steps from 1,3 propanediol by a key tandem intramolecular Michael cyclization-Horner-Wadsworth-Emmons olefination.
Stereodivergent approach to enantiopure hydroxyindolizidines through 1,3-dipolar cycloaddition of 3-hydroxypyrroline N-oxide derivatives
Cordero, Franca M.,Pisaneschi, Federica,Gensini, Martina,Goti, Andrea,Brandi, Alberto
, p. 1941 - 1951 (2007/10/03)
The (3S)-3-alkoxypyrroline N-oxides 7 and 27 were easily prepared from 1-malic acid and used as starting materials for enantiospecific syntheses of stereo differentiated polyhydro-xyindolizidines. Selection of the appropriate modality (inter or intramolec
