Photo-Induced <i>ortho</i>-C–H Borylation of Arenes through In Situ Generation of Rhodium(II) Ate Complexes
作者:Jin Tanaka、Yuki Nagashima、Antônio Junio Araujo Dias、Ken Tanaka
DOI:10.1021/jacs.1c05859
日期:2021.8.4
Photoinduced in situ “oxidation” of half-sandwich metal complexes to “high-valent” cationic metal complexes has been used to accelerate catalytic reactions. Here, we report the unprecedented photoinduced in situ “reduction” of half-sandwich metal [Rh(III)] complexes to “low-valent” anionic metal [Rh(II)] ate complexes, which facilitate ligand exchange with electron-deficient elements (diboron). This
Direct Synthesis of Pyrazolo[5,1‐
<i>a</i>
]isoindoles
<i>via</i>
Intramolecular Palladium‐Catalyzed CH Bond Activation
作者:Young Lok Choi、Hyuk Lee、Bum Tae Kim、Kihang Choi、Jung‐Nyoung Heo
DOI:10.1002/adsc.201000260
日期:2010.10.9
An efficient, directsynthesis of pyrazolo[5,1-a]isoindoles employing a palladium-catalyzed intramolecular CH bondactivation of 1-(2-halobenzyl)pyrazoles has been developed. The use of lithium chloride (LiCl) was found to be essential in these reactions, to suppress further CH bondactivation at the C-3 position of pyrazolo[5,1-a]isoindole, when C-3 is unsubstituted. This protocol can be applied to
已经开发出一种有效的直接合成吡唑并[5,1- a ]异吲哚的方法,该方法利用钯催化的1-(2-卤代苄基)吡唑的分子内CH键活化作用。发现在这些反应中必须使用氯化锂(LiCl),以抑制当C-3未取代时在吡唑并[5,1- a ]异吲哚的C-3位置的进一步CH键活化。该方案可用于通过顺序的分子内和分子间CH键活化合成具有六元中心环系统的吡唑并[5,1- a ]异喹啉和完全取代的吡唑并[5,1- a ]异吲哚。
Microwave-Assisted Generation and Capture by Azoles of<i>ortho</i>-Quinone Methide Intermediates under Aqueous Conditions
作者:Silvia González-Pelayo、Luis A. López
DOI:10.1002/ejoc.201701183
日期:2017.11.2
ortho-Quinone methides can be efficiently generated in water. Trapping with azoles provides a convenient route to alkylated azole derivatives, a class of heterocyclic compounds with potential applications in medicinal chemistry. This protocol does not require any activator for the generation of the reactiveintermediate. No chromatographic purification is required in most cases.
The invention relates to benzylazole derivatives of the general formula I
wherein A, B, R1, R2, X, Y and Z have the meanings indicated in the patent claim. The compounds are useful as antiarrhythmic agents and are obtained by reacting the corresponding 2,3-epoxypropyloxybenzylazole with a primary or secondary amine,
本发明涉及通式 I 的苄唑衍生物
其中 A、B、R1、R2、X、Y 和 Z 具有专利权利要求中的含义。这些化合物可用作抗心律失常药物,通过相应的 2,3-环氧丙氧基苄唑与伯胺或仲胺反应获得、
Non-catalytic alkylation of phenol and aniline with 1-hydroxymethylpyrazole
作者:H. S. Attaryan、V. I. Rstakyan、S. S. Hayotsyan、G. V. Asratyan