Synthesis of substituted 3-arylpiperidines and 3-arylpyrrolidines by radical 1,4 and 1,2-aryl migrations
作者:Alexandru Gheorghe、Béatrice Quiclet-Sire、Xavier Vila、Samir Z. Zard
DOI:10.1016/j.tet.2007.04.091
日期:2007.7
A route to 3-arylpiperidines and 3-arylpyrrolidines involving radical 1,4- and 1,2-aryl migrations has been explored. For the piperidines, the first route requires a xanthate addition to an N-allylarylsulfonamide, followed by acetylation and treatment with lauroyl peroxide to give the corresponding 1,4-aryl transfer product. This compound can be converted into the desired piperidine derivative following
Harnessing Energy-Transfer in N-Centered Radical-Mediated Synthesis of Pyrrolidines
作者:Peter Fodran、Carl-Johan Wallentin
DOI:10.1002/ejoc.202000537
日期:2020.6.16
Photo‐initiated energy‐transfer provides a route to nitrogen centered radicals, which can be harnessed in a formal [3+2] cycloaddition. The reaction is scalable, proceeds at very mild conditions tolerates various functional groups, and provides the corresponding trisubstituted pyrrolidines in good to excellent yields.
Electrosynthesis of β‐Acyloxy‐γ‐Selenyl Amines via Migratory Oxyselenation of
<i>N</i>
‐Acyl Allylamines
作者:Kejun Lin、Jianyong Lan、Tingshun Zhu
DOI:10.1002/adsc.202200597
日期:2022.10.18
generation of electrophilic selenium cation, followed by electrophilic addition to the unactivatedalkene, and successive water promoted intramolecular acyl migration. The reactions gave the products in up to 98% yield with controllable regio- and diastereoselectivities. Different chemoselectivity towards cyclization products was also viable with N-Boc and N-Cbz substrates. Both batch chemistry and flow
Cobalt‐Catalyzed Cascade Reaction of Ynamides and 1,3‐Dicarbonyl Compounds for Selective Synthesis of Differently Sized
<i>N</i>
‐Heterocycles
作者:Biao Zhang、Xu‐Heng Yang、Jian Huang、Cheng‐an Tao、Jianfang Wang
DOI:10.1002/adsc.202201002
日期:2023.3.7
manifold with various 1,3-dicarbonylcompounds and halogenated N-allyl ynamides was accomplished under alkaline reaction conditions, facilitating the synthesis of differently sized N-heterocycles. A large array of products was prepared to demonstrate the selective synthesis of N-heterocycles of different ring sizes (5-, 6-, and 7-membered rings) via cobalt catalysis. The reaction has broad substrate