Synthesis of the 5-HT1D receptor agonist MK-0462 via a Pd-catalyzed coupling reaction
作者:Cheng-yi Chen、David R. Lieberman、Robert D. Larsen、Robert A. Reamer、Thomas R. Verhoeven、Paul J. Reider、Ian F. Cottrell、Peter G. Houghton
DOI:10.1016/0040-4039(94)88204-5
日期:1994.9
Application of a palladium-catalyzed coupling between 3 and 5a to the synthesis of the novel 5-HT1DreceptoragonistMK-0462 (1), a potential anti-migraine drug, is described.
Cascading Radical Cyclization of Bis-Vinyl Ethers: Mechanistic Investigation Reveals a 5-<i>exo</i>/3-<i>exo</i>/retro-3-<i>exo</i>/5-<i>exo</i> Pathway
作者:Natasha F. O’Rourke、Katherine A. Davies、Jeremy E. Wulff
DOI:10.1021/jo301565u
日期:2012.10.5
an iterative synthesis of oligo-vinyl ethers, followed by a radical cascade to provide a family of hexahydro-2H-furo[3,4-b]pyrans. Our results for the radical cascade were consistent with either a direct 6-endo-trig addition of a vinyl radical onto the first vinyl ether function or an initial 5-exo-trig addition, followed by rearrangement to the more stable anomeric radical intermediate. In this report
Bifunctional Biphenyl-2-ylphosphine Ligand Enables Tandem Gold-Catalyzed Propargylation of Aldehyde and Unexpected Cycloisomerization
作者:Ting Li、Liming Zhang
DOI:10.1021/jacs.8b12478
日期:2018.12.19
been invoked as catalytic intermediates and their reactivities not studied. This work reports for the first time they are generated in situ and undergo nucleophilic addition to activated aldehydes in a bifunctional phosphine ligand-enabled gold catalysis. This development reveals a broad range of opportunities to achieve propargylic C-H functionalization for the first time under catalytic and mild conditions
Access to Electron-Rich Arene-Fused Hexahydroquinolizinones through a Gold-Catalysis-Initiated Cascade Process
作者:Lianzhu Liu、Liming Zhang
DOI:10.1002/anie.201203303
日期:2012.7.16
Golden Cascade: With a tethered, electron‐rich arene as the internal nucleophile, a gold‐catalyzed amide cyclization to an alkyne initiates a cascadeprocess that ends with a Ferrier rearrangement. Electron‐rich arene‐bearing hexahydroquinolizin‐2‐ones are formed in good yields and can be converted into indole alkaloids in only a few steps.
Synthesis of 3-Hydroxyalkylbenzo[b]furans via the Palladium-Catalysed Heteroannulation of Silyl-Protected Alkynols with 2-Iodophenol
作者:Brian C. Bishop、Ian F. Cottrell、David Hands
DOI:10.1055/s-1997-1357
日期:1997.11
The palladium-catalysed annulation of silyl-protected alkynols with 2-iodophenol gives silyl-protected 3-hyddroxyalkylbenzo[b]furans 3a-l. The use of silyl-protected propynols bearing a free hydroxyl or an O-triethylsilyl protecting group resulted in the formation of 1-oxa-2-silacyclopent-3-enes 5a-d as the major products. Removal of the silyl protecting groups from silyl benzo[b]urans 3c, 3e and 3i affords 3-hydroxyalkylbenzo[b]furans 9a-c in good yield.