scholarly journals Construction of Carbazoles by Palladium-Catalyzed Direct Cross-Coupling of Indoles with in situ Generated Aryl Vinyl Ketones

2017 ◽  
Vol 37 (10) ◽  
pp. 2662
Author(s):  
Quanlong Zhou ◽  
Changlei Zhu ◽  
Ge Wu ◽  
Yuanfei Zhang ◽  
Min Zhang ◽  
...  
Keyword(s):  
Cross Coupling ◽  
Direct Cross ◽  
Palladium Catalyzed

ChemInform Abstract: Palladium-Catalyzed Direct Cross-Coupling Reaction Between Indenes and Electron-Deficient Alkenes.

ChemInform ◽  
2010 ◽  
Vol 41 (43) ◽  
pp. no-no
Author(s):  
Yun-He Xu ◽  
Wee-Jian Wang ◽  
Zhen-Kang Wen ◽  
Joshua Jonathan Hartley ◽  
Teck-Peng Loh
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
Cross Coupling Reaction ◽  
Direct Cross ◽  
Palladium Catalyzed

scholarly journals Synthesis of 2-Alkenyl-Tethered Anilines

Synthesis ◽  
2017 ◽  
Vol 49 (13) ◽  
pp. 2873-2888 ◽  
Author(s):  
Scott Denmark ◽  
Hyung Chi
Keyword(s):  
Lewis Acid ◽  
Cross Coupling ◽  
Aryl Halides ◽  
Cope Rearrangement ◽  
The Third ◽  
Cross Metathesis ◽  
Direct Cross ◽  
Palladium Catalyzed

Three general routes for the synthesis of (E)-2-alkenyl-tethered anilines have been developed. The first route involves a 3-aza-Cope rearrangement of N-allylic anilines in the presence of a Lewis acid. The requisite N-allylic anilines were prepared by the addition of vinylmagnesium reagents to the corresponding aldimines. The second route details a direct cross-metathesis of 2-allylic or 2-homoallylic anilines with styrenes. The third route involves a palladium-catalyzed C–N cross-coupling of aryl halides. Taken together, these three strategies allowed access to the requisite aniline substrates with pendant alkenes at the 2-position with excellent trans selectivities.

Palladium-Catalyzed Direct Cross-Coupling Reaction of Glycals with Activated Alkenes

2011 ◽  
Vol 13 (16) ◽  
pp. 4394-4397 ◽  
Author(s):  
Yaguang Bai ◽  
Jing Zeng ◽  
Shuting Cai ◽  
Xue-Wei Liu
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
Cross Coupling Reaction ◽  
Direct Cross ◽  
Palladium Catalyzed

scholarly journals Palladium-Catalyzed Room Temperature Acylative Cross-Coupling of Activated Amides with Trialkylboranes

Molecules ◽  
2018 ◽  
Vol 23 (10) ◽  
pp. 2412 ◽  
Author(s):  
Weijia Shi ◽  
Gang Zou
Keyword(s):  
Functional Groups ◽  
Room Temperature ◽  
Cross Coupling ◽  
Methyl Tert Butyl Ether ◽  
Palladium Chloride ◽  
Butyl Ether ◽  
Good Tolerance ◽  
Palladium Catalyzed ◽  
Supported Palladium

A highly efficient acylative cross-coupling of trialkylboranes with activated amides has been effected at room temperature to give the corresponding alkyl ketones in good to excellent yields by using 1,3-bis(2,6-diisopropyl)phenylimidazolylidene and 3-chloropyridine co-supported palladium chloride, the PEPPSI catalyst, in the presence of K2CO3 in methyl tert-butyl ether. The scope and limitations of the protocol were investigated, showing good tolerance of acyl, cyano, and ester functional groups in the amide counterpart while halo group competed via the classical Suzuki coupling. The trialkylboranes generated in situ by hydroboration of olefins with BH3 or 9-BBN performed similarly to those separately prepared, making this protocol more practical.

scholarly journals Regioselective Synthesis of New 2,4-(Het)aryl-3H-pyrido[1′,2′:1,5]pyrazolo[4,3-d]pyrimidines Involving Palladium-Catalyzed Cross-Coupling Reactions

Molecules ◽  
2018 ◽  
Vol 23 (11) ◽  
pp. 2740 ◽  
Author(s):  
Abdelaziz Ejjoummany ◽  
Rabia Belaroussi ◽  
Ahmed El Hakmaoui ◽  
Mohamed Akssira ◽  
Gérald Guillaumet ◽  
...  
Keyword(s):  
Process Optimization ◽  
Cross Coupling ◽  
Regioselective Synthesis ◽  
Coupling Reactions ◽  
Pyrimidine Derivatives ◽  
Release Process ◽  
Cross Coupling Reactions ◽  
Palladium Catalyzed ◽  
High Yields

The design of some novel di-(het)arylated-3H-pyrido[1′,2′:1,5]pyrazolo[4,3-d]pyrimidine derivatives is reported. The series was developed from 1-aminopyridinium iodide, which afforded the key intermediate bearing two thiomethyl and amide functions, each of them useful for palladium catalyzed cross coupling reactions by alkyl sulfur release and C-O activation, respectively. The two regioselective and successive cross-coupling reactions were first carried out in C-4 by in situ C-O activation and next in C-2 by a methylsulfur release. Process optimization furnished conditions leading to products in high yields. The scope and limitations of the methodologies were evaluated and the final compounds characterized.

Controlling chemoselectivity in copper-catalyzed decarboxylative A3/A3 cross-couplings: direct formation of unsymmetrical 1,4-diamino-2-butynes

2017 ◽  
Vol 4 (1) ◽  
pp. 37-41 ◽  
Author(s):  
Panfeng Zhao ◽  
Huangdi Feng ◽  
Haoran Pan ◽  
Zhihua Sun ◽  
Minchao Tong
Keyword(s):  
Cross Coupling ◽  
Direct Cross ◽  
Direct Formation ◽  
Propiolic Acid

A direct cross-coupling of propiolic acid with two kinds of in situ formed iminiums has been achieved via a CuI/CuCl2-catalyzed decarboxylative A3/A3 domino process.

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