Palladium-catalyzed highly efficient synthesis of tetracenes and pentacenes
作者:Ming Chen、Yifeng Chen、Yuanhong Liu
DOI:10.1039/c2cc36700a
日期:——
Pd(0)-catalyzed cascade reactions of 1,7-diyn-3,6-bis(propargyl carbonate) with organoboronic acids have been developed, which provide one-pot access to functionalized tetracenes or pentacenes.
Barium Manganate. A Versatile Oxidant in Organic Synthesis
作者:Habib Firouzabadi、Zohreh Mostafavipoor
DOI:10.1246/bcsj.56.914
日期:1983.3
shown that this reagent is capable of oxidizing organic substrates, converting alcohols to their corresponding carbonyl compounds, aromaticamines to their corresponding azo compounds, hydroquinone to p-benzoquinone, benzylamine to benzaldehyde, and triphenylphosphine to its oxide in good yields. Saturated hydrocarbons, unsaturated hydrocarbons, unsaturated ketones, and saturated amines are not affected
Gold-catalyzed cascade cycloisomerization of 1,7-diyn-3,6-bis(propargyl carbonate)s: stereoselective synthesis of naphtho[b]cyclobutenes
作者:Ming Chen、Jun Liu、Lu Wang、Xiaobo Zhou、Yuanhong Liu
DOI:10.1039/c3cc44757j
日期:——
Gold-catalyzed cycloisomerization of 1,7-diyn-3,6-bis(propargyl carbonate)s leads to a highly efficient and diastereoselective synthesis of functionalized naphtho[b]cyclobutenes. A cascade sequence involving gold-catalyzed double 3,3-rearrangement, 6pi-electrocyclic reaction and a decarbonylative cyclization was proposed for this reaction.
Highly Efficient Brønsted Acid-Catalyzed Cycloisomerizations of Alkynes Bearing Bis(acetoxy) Groups to Indenyl Ketones
作者:Yuanhong Liu、Shaolin Zhou、Guijie Li、Bin Yan、Shenghai Guo、Yebing Zhou、Hao Zhang、Peng George Wang
DOI:10.1002/adsc.200800037
日期:2008.4.7
A Brønstedacid-catalyzedcycloisomerization of functionalized alkynes is described, which is assumed to be initiated through the formation of a benzylic cation intermediate. The reaction offers a highlyefficient and straightforward route to indenylketones with a wide range of substituents under mild conditions.