Gold Catalyzed Decarboxylative Cross-Coupling of Iodoarenes
作者:Ryan A. Daley、Aaron S. Morrenzin、Sharon R. Neufeldt、Joseph J. Topczewski
DOI:10.1021/jacs.0c06244
日期:2020.7.29
This report details a decarboxylativecross-coupling of (hetero)arylcarboxylates with iodoarenes in the presence of a gold cata-lyst (>25 examples, up to 96% yield). This reaction is site specific, which overcomes prior limitations associated with gold cat-alyzed oxidative coupling reactions. The reactivity of the (hetero)arylcarboxylate correlates qualitatively to the field effect pa-rameter (Fortho)
Synthetic, Spectroscopic and Biological Studies on Some
μ-Oxy-bis[triphenylantimony(V)]carboxylates and Cyclic Organoantimonates
作者:Surjeet S ingh、Neha Bahuguna、Kiran Singhal、Prem Raj
DOI:10.14233/ajchem.2021.23045
日期:——
A series of hitherto unreported μ-oxy-bis[triphenylantimony(V)]dicarboxylates and μ-oxy-bis[triphenylantimony(V)] chlorocarboxylates of general formula Ph3Sb(L)-O-Sb(L)Ph3 and Ph3Sb(Cl)-O-Sb(L)Ph3, respectively have been synthesized by the metathetical reaction of μ-oxybis-[triphenylantimony(V)]dichloride and silver salts of corresponding carboxylic acids in 1:2 and 1:1 molar ratio [where L = thiosalicyclic
Gold-Catalyzed C–O Cross-Coupling Reactions of Aryl Iodides with Silver Carboxylates
作者:Guifang Chen、Bo Xu
DOI:10.1021/acs.orglett.3c02254
日期:2023.9.1
We have developed a C–O cross-coupling reaction of (hetero)aryl iodides with silver carboxylates via a AuI/AuIII catalytic cycle. The transformation featured exclusive chemoselectivity and moisture/air insensitivity. Aromatic and aliphatic (including primary, secondary, and tertiary) silver carboxylates are all suitable substrates. Moreover, this protocol worked well intermolecularly and intramolecularly
我们开发了(杂)芳基碘化物与羧酸银通过 Au I /Au III催化循环进行的 C-O 交叉偶联反应。该转化具有独特的化学选择性和湿气/空气不敏感性。芳香族和脂肪族(包括伯、仲和叔)羧酸银都是合适的底物。此外,该方案在分子间和分子内均表现良好。最重要的是,无论底物的电子效应和空间位阻如何,都获得了良好的产率。
Isolation and structural characterization of some stable Pd(II) carboxylate complexes supported by 1,1′-bis(diphenylphosphino) ferrocene (dppf)
作者:Y Neo
DOI:10.1016/s0022-328x(02)01645-5
日期:2002.9.16
Although catalytically active palladium phosphine carboxylates are generally unstable, a series of such complexes are stabilized by dppf, viz. Pd(O2CR)(2)(dppt) [R = CF3 I, CF2CF3 II [1,43] CF2CF2CF3 III, CHCl2 IV, o-C6H4Cl VI, CH2CO2H VII, CH=CHCO2H VIII]. They have been spectroscopically characterized and their structures determined by X-ray single-crystal crystallography. Two derivatives viz. Pd(O4C2-O,O')(dppf) IX and PdCl(O2CPh)(dppt) X are included for comparison. They are invariably mononuclear with chelating phosphine and unidentate carboxylates. The more labile (and less basic) carboxylates tend to form complexes that are more resistive to reductive decomposition. Pd(O2CPh)(2)(dppf) V decomposes readily to PdCl2(dppf) in the presence of chlorinated solvents. (C) 2002 Elsevier Science B.V. All rights reserved.