Unified Strategy to Monoterpene Indole Alkaloids: Total Syntheses of (±)-Goniomitine, (±)-1,2-Dehydroaspidospermidine, (±)-Aspidospermidine, (±)-Vincadifformine, and (±)-Kopsihainanine A
Total syntheses of (±)-goniomitine, (±)-1,2-dehydroaspidospermidine, (±)-aspidospermidine, (±)-vincadifformine, and (±)-kopsihainanine A were achieved featuring two common key steps: (1) a palladium-catalyzed decarboxylative vinylation that provides quick access to cyclopentene intermediates containing all of the carbons present in the natural products and (2) an integrated oxidation/reduction/cyclization
Palladium-Catalyzed Decarboxylative Vinylation of Potassium Nitrophenyl Acetate: Application to the Total Synthesis of (±)-Goniomitine
作者:Zhengren Xu、Qian Wang、Jieping Zhu
DOI:10.1002/anie.201209970
日期:2013.3.11
product (±)‐goniomitine was synthesized by a method featuring two key steps: 1) fragment coupling to a functionalized cyclopentene by a novelpalladium‐catalyzed decarboxylative vinylation reaction and 2) an unprecedented one‐pot integrated oxidation/reduction/cyclization (IORC) process to convert the substituted cyclopentene into the tetracyclic skeleton of goniomitine with high chemo‐, regio‐, and diastereoselectivity
Direct Catalytic Decarboxylative Amination of Aryl Acetic Acids
作者:Duanyang Kong、Patrick J. Moon、Odey Bsharat、Rylan J. Lundgren
DOI:10.1002/anie.201912518
日期:2020.1.13
the acid unit to generate isocyanate or radical intermediates. Reported here is a process for the direct chemoselective decarboxylative amination of electron-poor arylacetates by oxidative Cu catalysis. The reaction proceeds at (or near) roomtemperature, uses native carboxylicacid starting materials, and is compatible with protic, electrophilic, and other potentially complicating functionality. Mechanistic