Palladium-catalyzed carbonylation of iminoquinones and aryl iodides to access aryl <i>p</i>-amino benzoates
作者:Siqi Wang、Lingyun Yao、Jun Ying、Xiao-Feng Wu
DOI:10.1039/d1ob01623g
日期:——
A palladium-catalyzed carbonylation of iminoquinones and aryliodides has been developed for the construction of aryl p-amino benzoates. Using benzene-1,3,5-triyl triformate (TFBen) as the CO source, the reaction proceeded well to give various aryl p-amino benzoates in good to excellent yields. Additionally, control experiments were conducted to gain more insights into the reaction mechanism.
亚氨基醌和芳基碘化物的钯催化羰基化已被开发用于构建芳基对氨基苯甲酸酯。使用苯-1,3,5-三甲酸三酯 (TFBen) 作为 CO 源,反应进行得很好,以良好的收率得到了各种对氨基苯甲酸芳基酯。此外,还进行了对照实验以更深入地了解反应机理。
Quinoneimines in the Nenitzescu reaction
作者:V. M. Lyubchanskaya、E. K. Panisheva、S. A. Savina、L. M. Alekseeva、A. S. Shashkov、V. G. Granik
DOI:10.1007/s11172-006-0024-6
日期:2005.7
The Nenitzescureaction involving quinoneimines was studied; new 5-aminoindole, 5-aminobenzofuran, and 9-aminochromenopyridine derivatives were synthesized.
Willstaetter; Kubli, Chemische Berichte, 1909, vol. 42, p. 4163
作者:Willstaetter、Kubli
DOI:——
日期:——
Direct Nitrosation of Aromatic Hydrocarbons and Ethers with the Electrophilic Nitrosonium Cation
作者:Eric Bosch、Jay K. Kochi
DOI:10.1021/jo00098a015
日期:1994.9
Various polymethylbenzenes and anisoles are selectively nitrosated with the electrophilic nitrosonium salt NO+ BFI4- in good conversions and yields under mild conditions in which the conventional procedure (based on nitrite neutralization with strong acid) is ineffective. The reactivity patterns in acetonitrile deduced from the various time/conversions in Tables 2 and 3 indicate that aromatic nitrosation is distinctly different from those previously established for electrophilic aromatic nitration. The contrasting behavior of NO+ in aromatic nitrosation is ascribed to a rate-limiting deprotonation of the reversibly formed Wheland intermediate, which in the case of aromatic nitration with NO2+ occurs with no deuterium kinetic isotope effect. Aromatic nitroso derivatives (unlike the nitro counterpart) are excellent electron donors that are subject to a reversible one-electron oxidation at positive potentials significantly less than that of the parent polymethylbenzene or anisole. As a result, the series of nitrosobenzenes are also much better Bronsted bases than the corresponding nitro derivatives, and this marked distinction, therefore, accounts for the large differentiation in the deprotonation rates of their respective conjugate acids (i.e. Wheland intermediates).
Kehrmann; Decker, Chemische Berichte, 1921, vol. 54, p. 2439