(<i>t</i>-Bu)<sub>2</sub>PNP(<i>i</i>-BuNCH<sub>2</sub>CH<sub>2</sub>)<sub>3</sub>N: New Efficient Ligand for Palladium-Catalyzed C−N Couplings of Aryl and Heteroaryl Bromides and Chlorides and for Vinyl Bromides at Room Temperature
作者:Ch. Venkat Reddy、Jesudoss V. Kingston、John G. Verkade
DOI:10.1021/jo702367k
日期:2008.4.1
chlorides possessing base-sensitive substituents (nitro, ester, and keto) provide coupling products with bulky aryl amines in good to excellent yields. Aryl halides possessing other functional groups including cyano, amino, trifluoromethyl, and phenol, coupled with equal ease, producing highly functionalized amines in good to excellent yields. Moreover, an aryl chloro group can be preserved in the presence
Bis(perfluoralkyl)phosphinous acids and derivatives and use thereof
申请人:Hoge Berthold
公开号:US20110124873A1
公开(公告)日:2011-05-26
The invention relates to bis(perfluoroalkyl)phosphinous acids, bis(perfluoroalkyl)thiophosphinous acids and derivatives, the synthesis thereof and the use thereof, in particular for the synthesis of air-stable metal complexes for catalytic processes.
BIS(PERFLUORALKYL)PHOSPHINIGE SÄUREN UND DERIVATE SOWIE DEREN ANWENDUNG
申请人:Merck Patent GmbH
公开号:EP2303902B1
公开(公告)日:2013-08-21
US8648202B2
申请人:——
公开号:US8648202B2
公开(公告)日:2014-02-11
Amination of Heteroaryl Chlorides: Palladium Catalysis or S<sub>N</sub>Ar in Green Solvents?
作者:Katie Walsh、Helen F. Sneddon、Christopher J. Moody
DOI:10.1002/cssc.201300239
日期:2013.8
reaction of heteroarylchlorides in the pyrimidine, pyrazine and quinazoline series with amines in water in the presence of KF results in a facile SNAr reaction and N‐arylation. The reaction is less satisfactory with pyridines unless an additional electron‐withdrawing group is present. The results showed that the transition‐metal‐free SNAr reaction not only compares favourably to palladium‐catalysed
嘧啶、吡嗪和喹唑啉系列中的杂芳基氯化物与水中的胺在 KF 存在下发生反应,导致容易的 S N Ar 反应和N芳基化。除非存在额外的吸电子基团,否则吡啶的反应不太令人满意。结果表明,无过渡金属的 S N Ar 反应不仅优于钯催化的偶联反应,而且在碱和溶剂方面也可以在环境可接受的(“绿色”)条件下进行。