Multiple Regioselective Functionalizations of Quinolines via Magnesiations
摘要:
A wide range of polyfunctionalized quinolines was prepared via chemo- and regioselective magnesiation reactions using appropriate Mg reagents, such as i-PrMgCl center dot LiCl, MesMgBr center dot LiCl, Mes(2)Mg center dot 2LiBr, TMPMgCl-LiCl, and TMP2Mg center dot 2LiCl. An application to the total synthesis of the biologically active compound talnetant was performed (six steps, 28%).
chromium(III)-catalyzedC(sp2)–C(sp3) cross-coupling is reported. The alkylations of halo-quinoline and phenacyl derivatives proceed at room temperature within minutes using the tetrahydrofuran-soluble chromium(III) complex CrCl3·3THF. The reactions occur without the formation of homo-coupling side products, which are common for the related iron-, cobalt- or manganese-catalyzed cross-coupling reactions
Mild Cobalt-Catalyzed Negishi Cross-Couplings of (Hetero)arylzinc Reagents with (Hetero)aryl Halides
作者:Diana Haas、Jeffrey M. Hammann、Ferdinand H. Lutter、Paul Knochel
DOI:10.1002/anie.201510665
日期:2016.3.7
CoCl2⋅2 LiCl (5 mol %) and HCO2Na (50 mol %) enables the cross‐coupling of various N‐heterocyclic chlorides and bromides as well as aromatic halogenated ketones with various electron‐rich and ‐poor arylzincreagents. The reactions reached full conversion within a few hours at 25 °C.
Multiple Regioselective Functionalizations of Quinolines via Magnesiations
作者:Nadège Boudet、Jennifer R. Lachs、Paul Knochel
DOI:10.1021/ol702494k
日期:2007.12.1
A wide range of polyfunctionalized quinolines was prepared via chemo- and regioselective magnesiation reactions using appropriate Mg reagents, such as i-PrMgCl center dot LiCl, MesMgBr center dot LiCl, Mes(2)Mg center dot 2LiBr, TMPMgCl-LiCl, and TMP2Mg center dot 2LiCl. An application to the total synthesis of the biologically active compound talnetant was performed (six steps, 28%).