The first asymmetric total synthesis of the monoterpenoid indole alkaloid arboduridine has been accomplished. The tricyclic A/B/D ring system was constructed by an enantioselective Michael reaction followed by intramolecular nucleophilic addition. Intramolecular α-amination of a ketone forged the piperidine ring, while a Horner-Wadsworth-Emmons (HWE) reaction was used to form the pyrrolidine ring. A reduction cyclization cascade led to formation of the tetrahydrofuran ring.
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http://dx.doi.org/10.1002/anie.202316016 | DOI Listing |
J Am Chem Soc
January 2025
Laboratory of Synthesis and Natural Products (LSPN), Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304, CH-1015 Lausanne, Switzerland.
In the dyotropic rearrangement of molecules with semiflexible structures, characterized by a freely rotating static C-C bond, the formation of a mixture of products is common due to the coexistence of several energetically comparable conformers. Herein, we report that it is possible to modulate the shifting groups by adjusting the metal's coordination sphere in Pd-based dyotropic rearrangement. In the presence of a catalytic amount of Pd(II) salt, the reaction of γ-hydroxyalkenes or γ,δ-dihydroxyalkenes with Selectfluor affords fluorinated tetrahydropyranols or 6,8-dioxabicyclo[3.
View Article and Find Full Text PDFJ Am Chem Soc
January 2025
Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States.
The development of catalytic methods for the synthesis of enantiopure saturated heterocycles has been a long-standing challenge in asymmetric catalysis. We describe the first highly enantioselective palladium-catalyzed βC(sp)-H arylation and olefination of lactams for the preparation of various chiral N-heterocycles bearing quaternary carbon centers. The presence of strongly electron-withdrawing groups on the chiral bifunctional MPAThio ligand is crucial to the reactivity of weakly coordinating lactams.
View Article and Find Full Text PDFBeilstein J Org Chem
January 2025
Department of Organic Chemistry, Faculty of Natural Science, Comenius University Bratislava, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovakia.
Axial chirality is present in a variety of naturally occurring compounds, and is becoming increasingly relevant also in medicine. Many axially chiral compounds are important as catalysts in asymmetric catalysis or have chiroptical properties. This review overviews recent progress in the synthesis of axially chiral compounds via asymmetric organocatalysis.
View Article and Find Full Text PDFACS Med Chem Lett
January 2025
Department of Life Science and Biotechnology, Faculty of Chemistry, Materials and Bioengineering, Kansai University, 3-3-35 Yamate-cho, Suita, Osaka 564-8680, Japan.
Inhibiting phosphofructokinase-1 (PFK1) is a promising approach for treating lactic acidosis and mitochondrial dysfunction by activating oxidative phosphorylation. Tryptolinamide (TLAM) has been shown as a PFK1 inhibitor, but its complex stereochemistry, with 16 possible isomers complicates further development. We conducted an asymmetric synthesis, determined the absolute configurations, and evaluated the PFK1 inhibitory activity of the TLAM isomers.
View Article and Find Full Text PDFChem Asian J
January 2025
Kasetsart University - Bangkhen Campus: Kasetsart University, Chemistry, 50, Department of Chemistry, Faculty of Science, Kasetsart UNiversity, Ladyao, Chatu, 10900, Bangkok, THAILAND.
(+)-Febrifugine, a natural antimalarial compound with a promising therapeutic profile, has become a hot target for synthetic chemists seeking to optimize its biological activity and expand its therapeutic applications. In this research, we present a stereocontrolled synthesis of (+)-febrifugine using both azide and azide-free approaches. Starting from the commercially available chiral pool precursor, d-glucose, the synthesis was completed in 20 steps for both approaches.
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