Expanding Pd-Catalyzed C−N Bond-Forming Processes: The First Amidation of Aryl Sulfonates, Aqueous Amination, and Complementarity with Cu-Catalyzed Reactions
作者:Xiaohua Huang、Kevin W. Anderson、Danilo Zim、Lei Jiang、Artis Klapars、Stephen L. Buchwald
DOI:10.1021/ja035483w
日期:2003.6.1
The first general method for the Pd-catalyzedamination of aryl tosylates and benzenesulfonates was developed utilizing ligand 1, which belongs to a new generation of biaryl monophosphine ligands. In addition, the new catalyst system for the first time enables amidation of aryl arenesulfonates and aqueousamination protocols that do not necessitate the use of cosolvents. The substrate scope has been
Pd催化芳基甲苯磺酸酯和苯磺酸酯胺化的第一种通用方法是利用配体1开发的,该配体属于新一代联芳基单膦配体。此外,新的催化剂系统首次实现了芳基芳烃磺酸盐的酰胺化和不需要使用助溶剂的水性胺化方案。底物范围已显着扩大到包括含有伯酰胺和游离羧酸基团的芳基卤化物。在多功能基板的情况下,Pd 催化的胺化可以提供与 Cu 催化的 CN 键形成过程互补的选择性。
Revisiting the Ullmann−Ether Reaction: A Concise and Amenable Synthesis of Novel Dibenzoxepino[4,5-<i>d</i>]pyrazoles by Intramolecular Etheration of 4,5-(<i>o,o</i>‘-Halohydroxy)arylpyrazoles
approach based on the palladium-catalyzed biaryl-ether linkage formation (Buchwald-Hartwig reaction) was also successfully applied, offering limitations with regard to the steric demand of the substituents. The synthesis of the key o,o'-halohydroxy-4,5-diarylpyrazole intermediates proceeds through the construction of the heterocyclic ring by a tandem amine-exchange/heterocyclization sequence of 3-N,N-(dimethylamino)-1
A practical and sustainable synthesis of arylsulfonate esters has been developed through electro-oxidation. This reaction employed the stable and readily available phenols and sodium arenesulfinates as the starting materials and took place under mild reaction conditions without additional oxidants. A wide range of arylsulfonate esters including those bearing functional groups were produced in good
[EN] ALKYLUREA DERIVATIVES ACTIVE AGAINST CANCER CELLS<br/>[FR] DÉRIVÉS D'ALKYLURÉE ACTIFS CONTRE LES CELLULES CANCÉREUSES
申请人:UNIV LAVAL
公开号:WO2012142698A1
公开(公告)日:2012-10-26
Compounds of formula (I) : wherein A, m, n, R1, X, Y, R2, R3, R4, R5 and R6, as defined herein are provided as useful for the treatment of cancer or for the manufacture of anti-cancer agents.