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
On the Gold-Catalyzed Generation of Vinyl Cations from 1,5-Diynes
作者:Thomas Wurm、Janina Bucher、Sarah B. Duckworth、Matthias Rudolph、Frank Rominger、A. Stephen K. Hashmi
DOI:10.1002/anie.201700057
日期:2017.3.13
Conjugated 1,5‐diynes bearing two aromatic units at the alkyne termini were converted in the presence of a gold catalyst. Under mild conditions, aryl‐substituted dibenzopentalenes were generated. Calculations predict that aurated vinyl cations are key intermediates of the reaction. A bidirectional approach provided selective access to the angular annulated product in high yield, which was explained