CsF-promoted carboxylation of aryl(hetaryl) terminal alkynes with atmospheric CO<sub>2</sub> at room temperature
作者:B. Yu、P. Yang、X. Gao、Z. Z. Yang、Y. F. Zhao、H. Y. Zhang、Z. M. Liu
DOI:10.1039/c7nj01779k
日期:——
A CsF-promoted carboxylation of aryl(hetaryl) terminal alkynes with atmospheric CO2 in the presence of trimethylsilylacetylene was developed to give functionalized propiolic acid products at roomtemperature. A wide range of propiolic acids bearing functional groups was successfully obtained in good to excellent yields. Mechanistic studies demonstrate that in the carboxylation process the alkynylsilane
作者:Franke, Wilfried、Schwarz, Helmut、Thies, Helga、Chandrasekhar, Jayaraman、Raque' Schleyer, Paul von、et al.
DOI:——
日期:——
A 13C nmr study on the tris(phenylethynyl)methyl and α,α-bis(phenylethynyl)benzyl cations: the tris- and bis-ethynologues of the triphenylmethyl cation
Geminal and vicinal<sup>13</sup>C–<sup>13</sup>C coupling constants in carboxylic acid derivatives
作者:Penny A. Chaloner
DOI:10.1039/p29800001028
日期:——
Geminal 13C–13Ccouplingconstants in αβ-unsaturated azlactones and the acids and esters derived from their hydrolysis are large and strongly dependent on configuration. Couplingconstants in simple 13C1-labelled carboxylic acids are also reported; vicinal couplings show a strong geometric dependence but the geminal couplings depend mainly on hybridisation.
αβ-不饱和氮杂内酯中的Geminal 13 C– 13 C耦合常数以及它们水解产生的酸和酯很大,并且强烈依赖于构型。还报道了在简单的13 C 1标记的羧酸中的偶联常数。相邻的偶合显示出很强的几何依赖性,但是双性偶合主要依赖于杂交。
Ligand-Free Ag(I)-Catalyzed Carboxylation of Terminal Alkynes with CO<sub>2</sub>
作者:Xiao Zhang、Wen-Zhen Zhang、Xiang Ren、Lin-Lin Zhang、Xiao-Bing Lu
DOI:10.1021/ol200638z
日期:2011.5.6
A convenient approach to selectively prepare a wide range of functionalized propiolic acids was developed by Agl-catalyzed carboxylation of terminal alkynes using carbon dioxide as carboxylative agent under ligand-free conditions.