An efficient method for palladium-catalyzed direct Hiyama coupling of various quinoxalin-2(1H)-ones with aryl siloxanes has been developed. The protocol provides a convenient access to a variety of useful C3-arylated 1-methylquinoxalin-2(1H)-one derivatives in reasonable yields by using low cost water as a solvent and oxygen as an oxidant.
In Situ Generation of ArCu from CuF<sub>2</sub>
Makes Coupling of Bulky Aryl Silanes Feasible and Highly Efficient
作者:Juan delPozo、Juan A. Casares、Pablo Espinet
DOI:10.1002/chem.201504435
日期:2016.3.14
fairly hindered aryl silanes with aryl, anisyl, phenylaldehyde, p‐cyanophenyl, p‐nitrophenyl, or pyridyl iodides of conventional size. The reaction involves the activation of the silane by CuII, followed by disproportionation and transmetalation from the CuI(aryl) to PdII, upon which coupling takes place. CuIII formed during disproportionation is reduced to CuI(aryl) by excess aryl silane, so that
Methods for fluorinating organic compounds are described herein.
本文描述了有机化合物氟化的方法。
Fluorination of organic compounds
申请人:Ritter Tobias
公开号:US09024093B2
公开(公告)日:2015-05-05
Methods for fluorinating organic compounds are described herein.
本文描述了有机化合物氟化的方法。
Trialkoxysilane Exchange: Scope, Mechanism, Cryptates and pH‐Response
作者:Selina Hollstein、Philipp Erdmann、Andreas Ulmer、Henrik Löw、Lutz Greb、Max von Delius
DOI:10.1002/anie.202304083
日期:2023.6.26
The exchange reaction of trialkoxysilanes with alcohols typically requires very harsh conditions and has therefore not been used for the self-assembly of host-guest systems. In this work, unexpected solvent and salt effects are described, rationalized and exploited for the synthesis of degradable supramolecular hosts.