Palladium-Catalyzed Difluorocarbene Transfer Enabled Divergent Synthesis of γ-Butenolides and Ynones from Iodobenzene and Terminal Alkynes
作者:Heyun Sheng、Zhiwei Chen、Qiuling Song
DOI:10.1021/jacs.3c13044
日期:2024.1.17
Herein, we report a ligand-controlled palladium-catalyzed method that enables the synthesis of ynones and γ-butenolides with excellent regioselectivity from the same set of readily available aryl iodides, aryl acetylenes, and BrCF2CO2K. In this reaction, the [PdII]═CF2 does demonstrate electrophilicity and can generate CO readily when reacting with H2O. It is environmentally friendly and safe compared
在此,我们报道了一种配体控制的钯催化方法,该方法能够从同一组容易获得的芳基碘化物、芳基乙炔和 BrCF 2 CO 2 K 合成具有优异区域选择性的炔酮和 γ-丁烯内酯。在该反应中, [Pd II ]=CF 2确实表现出亲电性,与 H 2 O 反应时很容易生成 CO。与传统方法相比,它对环境友好且安全,并且当前的方案使我们能够以高产率提供炔酮和 γ-丁烯内酯出色的功能容差。此外,利用该策略还可以与相应的酚和醇获得酯。生物活性化合物后期功能化的成功进一步说明了该方案在材料开发和药物发现中的合成效用。
A new, fast and efficient synthesis of 3-aryl indenones: intramolecular cyclization of 1,3-diarylpropynones in superacids
作者:Aleksander V Vasilyev、Stéphane Walspurger、Patrick Pale、Jean Sommer
DOI:10.1016/j.tetlet.2004.03.026
日期:2004.4
1,3-Diarylpropynones were cleanly converted to the corresponding 3-arylindenones in various superacidic media. This new. simple. one-pot reaction proved to be efficient (yields up to 95%) and very fast (reaction time less than 30 min). (C) 2004 Elsevier Ltd. All rights reserved.
Chemistry of 1,3-diarylpropynones in superacids
作者:A. V. Vasilyev、S. Walspurger、M. Haouas、J. Sommer、P. Pale、A. P. Rudenko
DOI:10.1039/b412323a
日期:——
In superacids with H0
=
−14 to −20, it has been found that 1,3-diarylpropynones ArCCCOAr′ are either protonated on oxygen of carbonyl groups with the formation of stable ions ArCCC(O+H)Ar′ or undergo further transformations when the highly conjugated system is electron-rich enough. In the latter case, 3-arylindenones are produced very rapidly and with high efficiency (up to 95% yield in less than 30 min). The influence of the substituents Ar, Ar′ and of the reaction conditions on the behavior of 1,3-diarylpropynones and on the intramolecular cyclisation have been studied. From the collected data, a mechanism has been proposed involving vinyl cations ArC+=CHCOAr′ and/or dications ArC+=CHC(O+H)Ar′.
Protonation and cyclization of 1,3-diarylpropynones in superacids
作者:A. V. Vasil’ev、S. Walspurger、P. Pale、J. Sommer、M. Haouas、A. P. Rudenko
DOI:10.1007/s11178-005-0097-y
日期:2004.12
1,3-Diarylpropynones ArC≡CCOAr′ in superacids with H 0 ranging from −20 to − 14 undergo protonation at the carbonyl oxygen atoms to give stable ArC≡CC(O+H)Ar′ ions or at the acetylenic C2 atom with formation of reactive ArC+=CHCOAr′ species. The effects of the Ar and Ar′ substituents and reaction conditions on the intramolecular cyclization of ArC+=CHCOAr′ to 3-arylinden-1-ones are discussed.