65663-77-6Relevant academic research and scientific papers
Improved procedure for single-electron-transfer-induced grignard cross-coupling reaction
Shirakawa, Eiji,Okura, Keisho,Uchiyama, Nanase,Murakami, Takuya,Hayashi, Tamio
supporting information, p. 922 - 924 (2014/06/23)
Aryl Grignard reagents were found to undergo coupling with aryl or alkenyl bromides in the presence of LiCl in a mixed solvent consisting of toluene and THF (2/1). Previously employed removal of THF with evacuation from Grignard solutions is no longer needed to obtain biaryls and styrene derivatives.
Single electron transfer-induced cross-coupling reaction of alkenyl halides with aryl Grignard reagents
Shirakawa, Eiji,Watabe, Ryo,Murakami, Takuya,Hayashi, Tamio
supporting information, p. 5219 - 5221 (2013/06/27)
Alkenyl halides were found to undergo coupling with aryl Grignard reagents to give the corresponding styrene derivatives in a stereo-retained manner. The cross-coupling reaction is considered to proceed through a single electron transfer mechanism.
Ligand effects on the stereochemical outcome of suzuki-miyaura couplings
Lu, Guo-Ping,Voigtritter, Karl R.,Cai, Chun,Lipshutz, Bruce H.
experimental part, p. 3700 - 3703 (2012/06/15)
The ligands associated with various Pd catalysts play a crucial role in determining the stereochemistry of cross-couplings between boronic acids and Z-alkenyl halides. A ligand on palladium has been found that leads to the desired products under mild conditions and in high yields that, in most cases, retain their Z-olefin geometry.
Silicon-Based Cross-Coupling Reagent and Production Method of Organic Compound Using the Same
-
Page/Page column 16, (2009/04/24)
In one embodiment of the present invention, a silicon-based cross-coupling reagent is disclosed which is a highly stable tetraorganosilicon compound allowing for a cross-coupling reaction under mild reaction conditions without using fluoride ions, transition metal promoter, or strong bases, and the residue of the silicon reagent can be recovered and reused. The silicon-based cross-coupling reagent is a silicon compound in which an o-hydroxymethylphenyl group is connected to a silicon atom for intramolecular activation.
Palladium-tetraphosphine catalysed heck reaction with simple alkenes: Influence of reaction conditions on the migration of the double bond
Fall, Yacoub,Berthiol, Florian,Doucet, Henri,Santelli, Maurice
, p. 1683 - 1696 (2008/02/08)
The Heck reaction of aryl halides with simple alk-1-enes is a powerful method for the synthesis of (E)-1-arylalk-1-ene derivatives. The major problem of this reaction is the palladium-catalysed migration of the carbon-carbon double bond along the alkyl ch
Synthesis and cross-coupling reaction of alkenyl[(2-hydroxymethyl)phenyl]dimethylsilanes
Nakao, Yoshiaki,Imanaka, Hidekazu,Chen, Jinshui,Yada, Akira,Hiyama, Tamejiro
, p. 585 - 603 (2008/02/06)
Highly stable alkenyl[2-(hydroxymethyl)phenyl]dimethylsilanes are prepared by stereo- and regioselective hydrosilylation of alkynes catalyzed either by a platinum or ruthenium catalyst using protected [2-(hydroxymethyl)phenyl]dimethylsilanes. Cyclic silyl ether, 1,1-dimethyl-2-oxa-1-silaindan, also serves as a starting material for the alkenylsilanes by the ring-opening reaction with alkenyl Grignard reagents. The resulting alkenylsilanes undergo cross-coupling reaction with various aryl and alkenyl iodides under reaction conditions employing K2CO3 as a base at 35-50 °C in highly regio- and stereospecific manners. The reaction tolerates a diverse range of functional groups including silyl protections. The silicon residue is readily recovered and reused on a gram-scale synthesis. Intramolecular coordination of a proximal hydroxyl group is considered to efficiently form pentacoordinate silicates having a transferable group possibly at an axial position and, thus, responsible for the cross-coupling reaction under conditions significantly milder than those reported for the silicon-based reactions.
Alkenyl- and aryl[2-(hydroxymethyl)phenyl]dimethylsilanes: An entry to tetraorganosilicon reagents for the silicon-based cross-coupling reaction
Nakao, Yoshiaki,Imanaka, Hidekazu,Sahoo, Akhila K.,Yada, Akira,Hiyama, Tamejiro
, p. 6952 - 6953 (2007/10/03)
Alkenyl- and aryl[2-(hydroxymethyl)phenyl]dimethylsilanes, highly stable tetraorganosilicon reagents, are found to react with aryl and alkenyl iodides in the presence of a palladium catalyst and K2CO3 as a base, significantly milder conditions compared with those ever reported for the silicon-based cross-coupling reactions. The reaction tolerates a wide range of functional groups, including silyl protectors, and allows a gram-scale synthesis to recover and reuse the silicon residue. Copyright
