Iron-Catalysed Borylation of Arenediazonium Salts to Give Access to Arylboron Derivatives<i>via</i>Aryl(amino)boranes at Room Temperature
作者:Ludovic D. Marciasini、Nicolas Richy、Michel Vaultier、Mathieu Pucheault
DOI:10.1002/adsc.201200942
日期:2013.4.15
Complementary to previously described Miyaura borylation methods, a new access to boron derivatives via aryl(amino)boranes is described. Direct coupling between aryldiazonium salts and diisopropylaminoborane is catalysed by 0.1% ferrocene leading to the formation of a carbon‐boron bond. The obtained aryl(amino)boranes could eventually then be transformed into boronic acids, boronates or borates.
Borylation using group IV metallocene under mild conditions
作者:Ludovic D. Marciasini、Michel Vaultier、Mathieu Pucheault
DOI:10.1016/j.tetlet.2014.01.080
日期:2014.3
A borylation reaction of aromatic diazonium salts has been optimized using titanocene and zirconocenederivatives as catalysts. The reaction employs diisopropylaminoborane as a borylating agent and proceeds smoothly at room temperature to provide arylboronates after methanolysis and transesterification with pinacol. The reaction mechanism has been found to proceed via a radical pathway.
Method for preparing aminoarylborane compounds or derivatives thereof
申请人:Université de Bordeaux I
公开号:EP2881398A1
公开(公告)日:2015-06-10
The present invention provides a process for the preparation of aminoarylborane compounds and derivatives thereof comprising a step of arylation by reacting an aryl chloride with an aminoborane compound in the presence of a catalytic system.
Typically, the transformation comprises, converting Aryl-chloride Ar-Cl with an aminoborane such as
into an aminoarylborane compound of the following formula:
Thermal decomposition of hindered amine-borane adducts leads in high yields to monomeric (dialkylamino)boranes R1R2NâBH2
(R1 and R2
= alkyl) that are new and efficient boron-sources in the Pd0 catalyzed borylation reaction affording monomeric aryl(dialkylamino)boranes R1R2NâBHR3
(R3
= aryl).
Borylation of Unactivated Aryl Chlorides under Mild Conditions by Using Diisopropylaminoborane as a Borylating Reagent
作者:Hélène D. S. Guerrand、Ludovic D. Marciasini、Mélissa Jousseaume、Michel Vaultier、Mathieu Pucheault
DOI:10.1002/chem.201304861
日期:2014.5.5
The synthesis of arylboronic ester derivatives from aryl chlorides by using aryl(amino)boranes is described. Palladium‐catalyzed coupling between aryl chlorides and diisopropylaminoborane leads to the formation of a CB bond undermildconditions. A wide range of functional groups are tolerated, making this method particularly useful for the borylation of functionalized aromatics.