Silver(i)-catalyzed carboxylation of arylboronic esters with CO2
作者:Xiao Zhang、Wen-Zhen Zhang、Ling-Long Shi、Chun-Xiao Guo、Ling-Ling Zhang、Xiao-Bing Lu
DOI:10.1039/c2cc32045b
日期:——
A variety of arylboronic esters were efficiently carboxylated with CO2 using a simple AgOAc/PPh3 catalyst, affording the corresponding carboxylic acids in good yield. This simple and efficient silver(I) catalytic system showed wide functional group compatibility.
Selective Monoarylation of Aromatic Ketones and Esters via Cleavage of Aromatic Carbon–Heteroatom Bonds by Trialkylphosphine Ruthenium Catalysts
作者:Hikaru Kondo、Takuya Kochi、Fumitoshi Kakiuchi
DOI:10.1021/acs.orglett.6b03761
日期:2017.2.17
We report here the ruthenium-catalyzed selective monoarylation of aromatic ketones bearing two ortho carbon–heteroatom (O or N) bonds. Under the newly developed catalyst system consisting of RuHCl(CO)(PiPr3)2, CsF, and styrene, the C–O arylation of 2′,6′-dimethoxyacetophenone with a phenylboronate gave the C–O monoarylation product selectively. The selective C–O monoarylation was applicable to a variety
我们在这里报告了钌催化的带有两个邻位碳-杂原子(O或N)键的芳族酮的选择性单芳基化。在由RuHCl(CO)(P i Pr 3)2,CsF和苯乙烯组成的新开发的催化剂体系下,2',6'-二甲氧基苯乙酮与苯基硼酸酯的C–O芳基化选择性地产生了C–O单芳基化产物。选择性C–O单芳基化反应适用于各种芳基硼酸酯和芳族酮,并具有较高的区域选择性和化学选择性。使用芳族酯的C–O单芳基化作为关键步骤,也可以实现正式的交替烯醇合成。
Ruthenium-Catalyzed Carbon−Carbon Bond Formation via the Cleavage of an Unreactive Aryl Carbon−Nitrogen Bond in Aniline Derivatives with Organoboronates
作者:Satoshi Ueno、Naoto Chatani、Fumitoshi Kakiuchi
DOI:10.1021/ja0713431
日期:2007.5.1
refluxing toluene gave the corresponding phenylation product in 83% yield via aryl carbon−nitrogen bondcleavage. This reaction involves two notable features: (1) the coupling proceeds via the oxidative addition of an aryl carbon−nitrogen bond in anilines to the ruthenium complex, and (2) C−C bondformation takes place via transmetalation between the Ru−NR2 species and organoboronates.
good functional group compatibility. The experimental and computational (DFT) studies reveal that the pendent olefin does not only act as an indispensable element for the initial allene attack involving allenic C(sp3)–H bond cleavage, but it also induces a face-selective reaction of the olefin of the allylic group, leading to a highly diastereoselective formation of the product. Finally, the deuterium
Ruthenium‐Catalyzed Reductive Arylation of
<i>N</i>
‐(2‐Pyridinyl)amides with Isopropanol and Arylboronate Esters
作者:Thomas O. Ronson、Evelien Renders、Ben F. Van Steijvoort、Xubin Wang、Clarence C. D. Wybon、Hana Prokopcová、Lieven Meerpoel、Bert U. W. Maes
DOI:10.1002/anie.201810947
日期:2019.1.8
A new three‐component reductive arylation of amides with stable reactants (iPrOH and arylboronate esters), making use of a 2‐pyridinyl (Py) directing group, is described. The N‐Py‐amide substrates are readily prepared from carboxylic acids and PyNH2, and the resulting N‐Py‐1‐arylalkanamine reaction products are easily transformed into the corresponding chlorides by substitution of the HN‐Py group with