Green alternative solvents for the copper-catalysed arylation of phenols and amides
作者:Carlo Sambiagio、Rachel H. Munday、A. John Blacker、Stephen P. Marsden、Patrick C. McGowan
DOI:10.1039/c6ra02265k
日期:——
for the Cu-catalysed arylation of phenols and amides is reported. Alkyl acetates proved to be efficient solvents in the catalytic processes, and therefore excellent alternatives to the typical non-green solvents used for Cu-catalysed arylationreactions. Solvents such as isosorbide dimethyl ether (DMI) and diethyl carbonate also appear to be viable possibilities for the arylation of phenols. Finally
Rhodium(III)-Catalyzed Annulation of Pyridinones with Alkynes via Double C–H Activation: A Route to Functionalized Quinolizinones
作者:Juan Li、Yudong Yang、Zhigang Wang、Boya Feng、Jingsong You
DOI:10.1021/acs.orglett.7b01159
日期:2017.6.16
A Rh(III)-catalyzed oxidative annulation of pyridin-2(1H)-ones with alkynesviadouble C–H activation to produce highly functionalized 4H-quinolizin-4-ones is disclosed. This reaction features easily available starting materials, simple manipulation, a relatively wide substrate scope, and good functional group tolerance. The application of this protocol is demonstrated by the synthesis of a known fluorescent
A Manganese-promoted direct oxidative C−P bond formation between 2-pyridones and secondary phosphine oxides has been developed. The reported protocol proceeds under mild reaction conditions, and the C3-phosphinoylation is proposed to take place under a radical process in the presence of substoichiometric amount of Mn(II).
C(sp<sup>2</sup>)–H Trifluoromethylation of enamides using TMSCF<sub>3</sub>: access to trifluoromethylated isoindolinones, isoquinolinones, 2-pyridinones and other heterocycles
作者:Vinayak Krishnamurti、Socrates B. Munoz、Xanath Ispizua-Rodriguez、Jeffrey Vickerman、Thomas Mathew、G. K. Surya Prakash
DOI:10.1039/c8cc04907f
日期:——
A method for the direct C(sp2)–H trifluoromethylation of enamides, including biologically relevant isoindolinones, isoquinolinones and 2-pyridinones using TMSCF3 under oxidative conditions is presented. The protocol is convenient, operationally simple and exhibits high tolerance across a multitude of relevant handles and functional groups.
作者:Shanqing Tao、Jiaxi Xiao、Yadong Li、Fengxia Sun、Yunfei Du
DOI:10.1002/cjoc.202100278
日期:2021.9
The reaction of pyridin-2(1H)-ones with PhICl2 and NH4SCN enables an efficient regioselective thiocyanation, leading to the synthesis of the biologically interesting C5 thiocyanated 2-pyridones in good to high yields. The mechanistic pathway of this metal-free approach is postulated to involve the formation of the reactive thiocyanogen chloride from the reaction of PhICl2 and NH4SCN followed with the
吡啶-2(1 H )-酮与PhICl 2和NH 4 SCN 的反应可实现有效的区域选择性硫氰化,从而以良好或高产率合成具有生物学意义的C5 硫氰化2-吡啶酮。这种无金属方法的机械途径被假定为涉及从 PhICl 2和 NH 4 SCN的反应形成反应性氯化硫氰,然后是吡啶-2(1 H )-一个环的区域选择性亲电硫氰化。