Dibenzopentalenes from B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub>-Induced Cyclization Reactions of 1,2-Bis(phenylethynyl)benzenes
作者:Chao Chen、Marcel Harhausen、René Liedtke、Kathrin Bussmann、Aiko Fukazawa、Shigehiro Yamaguchi、Jeffrey L. Petersen、Constantin G. Daniliuc、Roland Fröhlich、Gerald Kehr、Gerhard Erker
DOI:10.1002/anie.201300871
日期:2013.6.3
'Lene' and mean: The strong Lewis acid B(C6F5)3 efficiently converts some bis(arylethynyl)benzenes into dibenzopentalenes through a series of Lewis acid induced cyclizationreactions at room temperature. Thus the reaction has the potential to be useful in the synthesis of substituted dibenzopentalene derivatives which are difficult to make by conventional means.
“ Lene”和均值:强路易斯酸B(C 6 F 5)3通过一系列路易斯酸在室温下诱导的环化反应,有效地将一些双(芳基乙炔基)苯转化为二苯并戊烯。因此,该反应具有用于合成取代的二苯并戊烯衍生物的潜力,这是用常规方法难以制备的。
Gold‐Catalyzed Aminoaromatizations of 1,2‐Bis(alkynyl)benzenes with Anthranils to Yield 1‐Amino‐2‐napthaldehyde Products
作者:Yashwant Bhaskar Pandit、Rai‐Shung Liu
DOI:10.1002/adsc.202000591
日期:2020.8.4
Gold‐catalyzedaminoaromatizations of 1,n‐diynes with anthranils afforded 1‐amino‐2‐napthaldehyde derivatives efficiently. In this reaction sequence, anthranils preferably attack at gold‐coordinated prop‐3‐yn‐1‐ols to generate α‐imino gold carbenes that enable subsequent cyclizations with the other alkynes. Chemical functionalizations of the resulting 1‐amino‐2‐napthaldehydes are presented to manifest
Supported palladium nanoparticles-catalyzed decarboxylative coupling approaches to aryl alkynes, indoles and pyrrolines synthesis
作者:C. Bal Reddy、Richa Bharti、Sandeep Kumar、Pralay Das
DOI:10.1039/c6ra12046f
日期:——
The polystyrene supported palladium (Pd@PS) nanoparticles (NPs) catalyzed decarboxylative coupling (DC) of arylhalides and alkynyl carboxylic acids was developed for the synthesis of diaryl alkynes. Indole and 3-pyrroline heterocycles were also synthesized from 2-iodo anilines/amino benzocycloheptene bromide and alkynyl carboxylic acids, following a domino decarboxylative coupling-cyclization (DCC)
Novel copper-freeSonogashiracouplingreaction of aryl halides with terminal acetylenes proceeded in the presence of 1,2-bis(2-thienylethynyl)benzene (1) as a trans-bidentatable ligand.
Highly effective copper-catalyzed decarboxylative coupling of aryl halides with alkynyl carboxylic acids
作者:Xiaoming Qu、Tingyi Li、Peng Sun、Yan Zhu、Hailong Yang、Jincheng Mao
DOI:10.1039/c1ob05969f
日期:——
We have developed a highly effective copper-catalyzeddecarboxylativecoupling of alkynylcarboxylic acids with various aryl and alkyl halides at 2 mol% loading of copper. This method is simple, economical and practical for the synthesis of disubstituted alkyne compounds.