Palladium-Catalyzed Cross-Coupling Reactions of Carboxylic Anhydrides with Organozinc Reagents
作者:Donghui Wang、Zhaoguo Zhang
DOI:10.1021/ol035801w
日期:2003.11.1
[reaction: see text] Negishi-type cross-coupling reaction was effected by employing organozincs and anhydrides or mixedanhydrides that formed in situ fromsodiumsalts of the corresponding acids and ethyl chloroformate under the catalysis of palladium(0). A general method for preparing symmetrical/unsymmetrical ketones was developed.
Complex Polyheterocycles and the Stereochemical Reassignment of Pileamartine A via Aza-Heck Triggered Aryl C–H Functionalization Cascades
作者:Benjamin T. Jones、Javier García-Cárceles、Lewis Caiger、Ian R. Hazelden、Richard J. Lewis、Thomas Langer、John F. Bower
DOI:10.1021/jacs.1c08615
日期:2021.9.29
N-polyheterocycles can be accessed via intramolecular Pd(0)-catalyzed alkene 1,2-aminoarylation reactions. The method uses N-(pentafluorobenzoyloxy)carbamates as the initiating motif, and this allows aza-Heck-type alkene amino-palladation in advance of C–H palladation of the aromatic component. The chemistry is showcased in the first total synthesis of the complex alkaloid (+)-pileamartine A, which has resulted in
Synthesis, characterization and thermal behaviour of solid 2-methoxybenzoates of trivalent metals
作者:A. B. Siqueira、C. T. Carvalho、E. Y. Ionashiro、G. Bannach、E. C. Rodrigues、M. Ionashiro
DOI:10.1007/s10973-007-8546-1
日期:2008.6
thermogravimetry and differential thermal analysis (TG-DTA), differential scanning calorimetry (DSC), X-ray powder diffractometry, infrared spectroscopy and complexometry were used to characterize and to study the thermalbehaviour of these compounds. The results provided information on the composition, dehydration, coordination mode, structure, thermalbehaviour and thermal decomposition.
已经合成了固态Ln(L)3化合物,其中 Ln 代表三价Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu和Y, L 为2-甲氧基苯甲酸 酯。同时热重分析和差示热分析(TG-DTA),差示扫描量热法(DSC),X射线粉末衍射法,红外光谱和络合分析法表征和研究了这些化合物的热行为。结果提供了有关组成,脱水,配位模式,结构,热行为和热分解的信息。
Weak Coordinating Carboxylate Directed Rhodium(III)-Catalyzed C–H Activation: Switchable Decarboxylative Heck-Type and [4 + 1] Annulation Reactions with Maleimides
group assisted C–H activation with maleimides leading to novel and switchable decarboxylative Heck-type and [4 + 1] annulation products catalyzed by Rh(III) has been reported. In these reactions, solvents play a vital role in switching the selectivity. An aprotic solvent, THF, leads to the decarboxylative Heck-type product while the protic solvent, TFE, results in the [4 + 1] annulation product. The
Highly Efficient Copper- and Palladium-Free One-Pot Coupling of Alkynes with Sodium Carboxylate Salts Using Cyanuric and Magnesium Chlorides
作者:Mohammad Soltani Rad、Somayeh Behrouz
DOI:10.1055/s-0030-1260336
日期:2011.10
A facile and highly efficient copper- and palladium-free procedure for the one-pot synthesis of ynones via coupling of sodium carboxylate salts with alkynes is described. In this method, cross-coupling of terminal alkynes with a mixture of structurally diverse sodium carboxylate salts, cyanuric chloride and triethylamine in the presence of magnesium chloride furnishes the corresponding ynones in good