A palladium-catalyzed intramolecular carbonylative annulation reaction for the synthesis of 4,5-fused tricyclic 2-quinolones
作者:Xiwu Zhang、Haichao Liu、Yanxing Jia
DOI:10.1039/c6cc02600a
日期:——
A concise and efficient synthetic route to 4,5-fused tricyclic 2-quinolones through a palladium-catalyzed carbonylative annulation of alkyne-tethered N-substituted o-iodoanilines has been developed. This reaction proceeds smoothly under mild reaction conditions...
Sonogashira Reaction of Aryl and Heteroaryl Halides with Terminal Alkynes Catalyzed by a Highly Efficient and Recyclable Nanosized MCM-41 Anchored Palladium Bipyridyl Complex
A heterogeneous catalyst, nanosized MCM-41-Pd, was used to catalyze the Sonogashira coupling of aryl and heteroaryl halides with terminal alkynes in the presence of CuI and triphenylphosphine. The coupling products were obtained in high yields using low Pd loadings to 0.01 mol%, and the nanosized MCM-41-Pd catalyst was recovered by centrifugation of the reaction solution and re-used in further runs without significant loss of reactivity.
Tandem Regioselective Hydroformylation-Hydrogenation of Internal Alkynes Using a Supramolecular Catalyst
作者:Weiwei Fang、Bernhard Breit
DOI:10.1002/anie.201809073
日期:2018.11.5
electron‐withdrawing groups. By applying this novel catalytic system, a general protocol for the Rh‐catalysed hydroformylation‐hydrogenation of unsymmetrical internal alkynes, functionalized with a carboxylic acid, was found to furnish aliphatic aldehydes in high regio‐ and chemoselectivities. Control experiments confirm the enzyme‐like supramolecular catalyst mode of action.
Sonogashira cross-coupling reactions with heteroaryl halides in the presence of a tetraphosphine–palladium catalyst
作者:Marie Feuerstein、Henri Doucet、Maurice Santelli
DOI:10.1016/j.tetlet.2005.01.044
日期:2005.3
Heteroaryl halides undergoes cross-couplings with alkynes in good yields in the presence of [PdCl(C3H5)]2/cis,cis,cis-1,2,3,4-tetrakis(diphenylphosphinomethyl)cyclopentane as catalyst. A variety of heteroaryl halides such as pyridines, quinolines, a pyrimidine, an indole, a thiophene, or a thiazole have been used successfully. The reaction also tolerates several alkynes such as phenylacetylene and
在[PdCl(C 3 H 5)] 2 /顺式,顺式,顺式-1,2,3,4-四(二苯基膦甲基)环戊烷的存在下,杂芳基卤化物与炔烃进行交叉偶联,收率很高。已经成功地使用了各种杂芳基卤化物,例如吡啶,喹啉,嘧啶,吲哚,噻吩或噻唑。该反应还可以耐受几种炔烃,例如苯乙炔和一系列烷-1-炔醇。此外,该催化剂可在低负荷下与某些底物一起使用。
Facile synthesis of substituted thiophenes via Pd/C-mediated sonogashira coupling in water
作者:Sirisilla Raju、P. Rajender Kumar、K. Mukkanti、Pazhanimuthu Annamalai、Manojit Pal
DOI:10.1016/j.bmcl.2006.09.041
日期:2006.12
The first successful Pd/C-mediated Sonogashira coupling of iodothiophene with terminal alkynes in water is described here. Pd/C-CuI-PPh(3) was found to be an efficient catalyst system for this coupling reaction. Using this economic and reliable process a variety of acetylenic thiophenes with a wide range of functional groups were prepared in good yields. Synthetic applications and in vitro anticancer