نتایج جستجو برای: mizoroki heck reaction

تعداد نتایج: 413170  

Journal: :Molecules 2010
Jan C Namyslo Jörg Storsberg Jens Klinge Christian Gärtner Min-Liang Yao Nuket Ocal Dieter Eckhard Kaufmann

The synthetic potential of stereoselective, palladium-catalyzed hydro(het)arylation reactions of bi-, tri- and tetracyclic (hetero)alkenes in the presence of phospines and arsines as highly efficient ligands was studied. The mechanism of this reductive Heck reaction becomes more complex in the case of benzonorbornenes. Hydroarylation of diazabicyclo-[2.2.1]heptenes provides a stereoselective ac...

Journal: :Organic & biomolecular chemistry 2004
Alvise Perosa Pietro Tundo Maurizio Selva Sergei Zinovyev Alberto Testa

The rate of the Pd/C catalyzed Heck coupling of Ar-I with CH(2)=CH-R is accelerated tenfold by the presence of Aliquat 336 (A336), a well known phase transfer catalyst, and an ionic liquid. Both when conducted in A336 as solvent, and in an isooctane/A336/aqueous triphasic mixture, the Heck reaction of aryl iodides with electron deficient olefins, catalyzed by Pd/C, proceeds with high yields and...

Journal: :Organic letters 2004
Daisuke Tanaka Andrew G Myers

[reaction: see text] A palladium-catalyzed decarboxylative arylation reaction was shown to produce Heck-type coupling products using a number of different arene carboxylic acid and 2-cycloalken-1-one substrates. The more conventional Heck coupling of an aryl iodide and a 2-cycloalken-1-one reactant was also briefly explored for comparison, where it was found that phosphine-free (Jeffery) condit...

2017
Claire J C Lamb Bryan G Nderitu Gemma McMurdo John M Tobin Filipe Vilela Ai-Lan Lee

A PdII catalyst system has been used to successfully catalyse two mechanistically distinct reactions in a one-pot procedure: dehydrogenation of 2,2-disubstituted cyclopentane-1,3-diones and the subsequent oxidative Heck coupling. This auto-tandem catalytic reaction is applicable to both batch and continuous flow processes, with the latter being the first example of a tandem aerobic dehydrogenat...

Journal: :Journal of the American Chemical Society 2008
Jared H Delcamp Alexandria P Brucks M Christina White

A novel chelate-controlled intermolecular oxidative Heck reaction is reported that proceeds with a wide range of nonresonance stabilized alpha-olefin substrates and organoboron reagents to afford internal olefin products in good yields and outstanding regio- and E: Z stereoselectivities. Pd-H isomerization, common in many Heck reactions, is not observed under these mild, oxidative conditions. T...

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