PROCESS FOR PREPARING ARYL- AND HETEROARYLACETIC ACID DERIVATIVES
申请人:Himmler Thomas
公开号:US20140155632A1
公开(公告)日:2014-06-05
The invention relates to a process for preparing aryl- and heteroarylacetic acids and derivatives thereof by reaction of aryl or heteroaryl halides with malonic diesters in the presence of a palladium catalyst, of one or more bases and optionally of a phase transfer catalyst. This process enables the preparation of a multitude of functionalized aryl- and heteroarylacetic acids and derivatives thereof, especially also the preparation of arylacetic acids with sterically demanding substituents.
PROCESS FOR PREPARING ARYL - AND HETEROARYLACETIC ACID DERIVATIVES
申请人:BAYER INTELLECTUAL PROPERTY GMBH
公开号:US20150315171A1
公开(公告)日:2015-11-05
The invention relates to a process for preparing aryl- and heteroarylacetic acids and derivatives thereof by reaction of aryl or heteroaryl halides with malonic diesters in the presence of a palladium catalyst, of one or more bases and optionally of a phase transfer catalyst. This process enables the preparation of a multitude of functionalized aryl- and heteroarylacetic acids and derivatives thereof, especially also the preparation of arylacetic acids with sterically demanding substituents.
Practical Synthesis of 2-Arylacetic Acid Esters via Palladium- Catalyzed Dealkoxycarbonylative Coupling of Malonates with Aryl Halides
作者:Bingrui Song、Felix Rudolphi、Thomas Himmler、Lukas J. Gooßen
DOI:10.1002/adsc.201100102
日期:2011.6
A new palladium‐based system was developed that catalyzes the coupling of arylhalides with diethyl malonates in the presence of mild bases. In the course of the reaction, the intermediately formed diethyl arylmalonate is directly converted into the arylacetic acid ester via liberation of carbon dioxide and an alkanol. This cross‐coupling/dealkoxycarbonylation process provides an efficient and high‐yielding