Palladium-Catalyzed Decarboxylative<i>sp</i>-<i>sp</i><sup>2</sup>Cross-Coupling Reactions of Aryl and Vinyl Halides and Triflates with α,β-Ynoic Acids using Silver Oxide
作者:Hyunseok Kim、Phil Ho Lee
DOI:10.1002/adsc.200900502
日期:2009.11
Palladium-catalyzed decarboxylative sp-sp2 cross-couplingreactions of aryl and vinyl halides and triflates with α,β-ynoic acids using silver oxide have been developed. A variety of α,β-ynoic acids were readily decarboxylated in the presence of silver oxide and then, generated in situ, silver acetylides were coupled with electrophiles in the presence of a palladium(0) catalyst under neutral conditions
Highly effective copper-catalyzed decarboxylative coupling of aryl halides with alkynyl carboxylic acids
作者:Xiaoming Qu、Tingyi Li、Peng Sun、Yan Zhu、Hailong Yang、Jincheng Mao
DOI:10.1039/c1ob05969f
日期:——
We have developed a highly effective copper-catalyzeddecarboxylativecoupling of alkynylcarboxylic acids with various aryl and alkyl halides at 2 mol% loading of copper. This method is simple, economical and practical for the synthesis of disubstituted alkyne compounds.
A method for the selectivedeuteration of polyfunctional organic molecules using catalytic amounts of [RuCl2 (PPh3 )3 ] and D2 O as a deuteriumsource is presented. Through variation of additives like CuI, KOH, and various amounts of zinc powder, orthogonal chemoselectivities in the deuteration process are observed. Mechanistic investigation indicates the presence of different, defined Ru-complexes
Efficient Copper-Catalyzed Cross-Coupling Reaction of Alkynes with Aryl Iodides
作者:Che-Hung Lin、Yu-Jen Wang、Chin-Fa Lee
DOI:10.1002/ejoc.201000653
日期:——
A copper-catalyzed cross-coupling reaction of alkynes with aryl iodides is described. The system tolerates a broad range of functional groups and enables the use of sterically demanding substrates with only 1.0-2.5 mol-% of Cu 2 O and 1.0-2.5 mol-% of xantphos as the catalyst.
描述了炔烃与芳基碘化物的铜催化交叉偶联反应。该系统可耐受广泛的官能团,并能够使用空间要求严格的底物,只需 1.0-2.5 mol-% 的 Cu 2 O 和 1.0-2.5 mol-% 的黄磷作为催化剂。
A Palladium/Perfluoroalkylated Pyridine Catalyst for Sonogashira Reaction of Aryl Bromides and Chlorides in a Fluorous Biphasic System
作者:Wen-Bin Yi、Chun Cai、Xin Wang
DOI:10.1002/ejoc.200700287
日期:2007.7
chlorides in the presence of a catalytic amount of perfluoroalkylated pyridine as a ligand in a fluorousbiphasic system (FBS) composed of toluene and perfluorodecalin. The reaction can be performed under phosphane-, copper- and DMF-free conditions in an air atmosphere. By simple separation of the fluorous phase containing palladium/perfluoroalkylated pyridine catalyst, the reaction can be repeated several