作者:Jorn de Jong、Dorus Heijnen、Hugo Helbert、Ben L. Feringa
DOI:10.1039/c8cc08444k
日期:——
followed by the Buchwald–Hartwigamination with in situ released lithium amides is presented. In this work amides are used as masked ketones, revealed by the addition of organolithium reagents which generates a lithium amide, suitable for subsequent Buchwald–Hartwig coupling in the presence of a palladium catalyst. This methodology allows for rapid, efficient and atom economic synthesis of aminoarylketones
Cross-Coupling Knows No Limits: Assessing the Synthetic Potential of the Palladium-Catalysed Cross-Coupling of Organolithiums
作者:James D. Firth、Peter O'Brien
DOI:10.1002/cctc.201402886
日期:2015.2
Organolithiums have passed the test! Previously considered too reactive and unstable, organolithiums have been tamed and can now participate successfully in palladium‐catalysed cross‐coupling with aryl/vinyl bromides and triflates.
Catalytic Direct Cross-Coupling of Organolithium Compounds with Aryl Chlorides
作者:Valentín Hornillos、Massimo Giannerini、Carlos Vila、Martín Fañanás-Mastral、Ben L. Feringa
DOI:10.1021/ol402408v
日期:2013.10.4
Palladium-catalyzed direct cross-coupling of aryl chlorides with a wide range of (hetero)aryl lithium compounds is reported. The use of Pd-PEPPSI-IPent or Pd2(dba)3/XPhos as the catalyst allows for the preparation of biaryl and heterobiaryl compounds in high yields under mild conditions (room temperature to 40 °C) with short reaction times.
Nickel-Catalyzed Cross-Coupling of Organolithium Reagents with (Hetero)Aryl Electrophiles
作者:Dorus Heijnen、Jean-Baptiste Gualtierotti、Valentín Hornillos、Ben L. Feringa
DOI:10.1002/chem.201505106
日期:2016.3.14
Nickel‐catalyzed selective cross‐coupling of aromatic electrophiles (bromides, chlorides, fluorides and methyl ethers) with organolithium reagents is presented. The use of a commercially available nickel N‐heterocyclic carbene (NHC) complex allows the reaction with a variety of (hetero)aryllithium compounds, including those prepared via metal‐halogen exchange or direct metallation, whereas a commercially
Total synthesis of puerarin, an isoflavone C-glycoside
作者:David Y.W. Lee、Wu-Yan Zhang、Vishnu Vardhan R. Karnati
DOI:10.1016/s0040-4039(03)01715-5
日期:2003.9
We completed the first totalsynthesis of puerarin (1), an isoflavone C-glycoside. The key intermediate, β-d-glucopyranosyl-2,6-dimethoxybenzene (9), was obtained by coupling of a lithiated aromatic reagent (3) with pyranolactone (2) in 56% yield. Condensation of (16) with p-methoxybenzaldehyde gave the chalcone (17). The protected chalcone (18) was cyclized to (19) in the presence of Tl(NO3)3. Demethylation