Palladium/Copper-Catalyzed Oxidative CH Alkenylation/N-Dealkylative Carbonylation of Tertiary Anilines
作者:Renyi Shi、Lijun Lu、Hua Zhang、Borui Chen、Yuchen Sha、Chao Liu、Aiwen Lei
DOI:10.1002/anie.201303911
日期:2013.9.27
CH/CN activation: The first palladium/copper‐catalyzed aerobic oxidative CH alkenylation/N‐dealkylative carbonylation of tertiary anilines has been developed. Various functional groups were tolerated and acrylic ester could also be suitable substrates. This transformation provided efficient and straightforward synthesis of biologically active 3‐methyleneindolin‐2‐one derivatives from cheap and simple
Ç H / C Ñ活化:第一钯/铜催化氧化好氧Ç ħ烯基/ Ñ叔苯胺-dealkylative羰基化得到了发展。可以容忍各种官能团,丙烯酸酯也可以用作合适的底物。这种转化提供了从廉价,简单的底物中高效,直接地合成具有生物活性的3-亚甲基吲哚-2-酮衍生物的功能。
Ruthenium-Catalyzed Carbonylative Coupling of Anilines with Organoboranes by the Cleavage of Neutral Aryl C–N Bond
Herein, we report the first ruthenium-catalyzed Suzuki-type carbonylative reaction of electronically neutral anilines via C(aryl)-N bond cleavage. Without any ligand and base, diaryl ketones can be obtained in moderate to high yields by using Ru-3(CO)(12) as the catalyst and chelation assisted by pyridine. The pyridine ring has a significant effect on both high efficiency and high regioselectivity in the cleavage of the aryl C-N bond in anilines.
General and Practical Potassium Methoxide/Disilane-Mediated Dehalogenative Deuteration of (Hetero)Arylhalides
作者:Xin Wang、Ming-Hui Zhu、David P. Schuman、Dayou Zhong、Wen-Yan Wang、Lin-Yang Wu、Wei Liu、Brian M. Stoltz、Wen-Bo Liu
DOI:10.1021/jacs.8b07597
日期:2018.9.5
Herein we describe a general, mild and scalable method for deuterium incorporation by potassium methoxide/hexamethyldisilane-mediated dehalogenation of arylhalides. With CD3CN as a deuterium source, a wide array of heteroarenes prevalent in pharmaceuticals and bearing diverse functional groups are labeled with excellent deuterium incorporation (>60 examples). The ipso-selectivity of this method provides
在此,我们描述了一种通过甲醇钾/六甲基乙硅烷介导的芳基卤化物脱卤来掺入氘的通用、温和且可扩展的方法。以 CD3CN 作为氘源,广泛存在于药物中并具有不同官能团的杂芳烃被标记为具有优异的氘掺入(> 60 个例子)。这种方法的 ipso 选择性提供了对氘代吲哚和喹啉库的精确访问。我们方法的合成效用已通过将氘掺入复杂的天然和类药物化合物中得到证明。
Synthesis of Halogenated Anilines by Treatment of <i>N</i>,<i>N</i>-Dialkylaniline <i>N</i>-Oxides with Thionyl Halides
作者:Hayley Reed、Tyler R. Paul、William J. Chain
DOI:10.1021/acs.joc.8b01590
日期:2018.9.21
The special reactivity of N,N-dialkylaniline N-oxides allows practical and convenient access to electron-rich aryl halides. A complementary pair of reaction protocols allow for the selective para-bromination or ortho-chlorination of N,N-dialkylanilines in up to 69% isolated yield. The generation of a diverse array of halogenated anilines is made possible by a temporary oxidation level increase of N
N,N-二烷基苯胺N-氧化物的特殊反应性使得可以方便实用地获得富含电子的芳基卤化物。一对互补的反应协议允许用于选择性对-bromination或邻位的-chlorination N,N- -dialkylanilines在高达69%的分离收率。通过将N,N-二烷基苯胺暂时氧化为相应的N,N-二烷基苯胺N-氧化物并去除生成的弱N – O ,可以生成各种卤化苯胺 通过在低温下用亚硫酰溴或亚硫酰氯处理可实现键合。