Exploring the catalytic activity of Lewis-acidic uranyl complexes in the nucleophilic acyl substitution of acid anhydrides

Abstract

Uranyl(vi) ion is a strongly hard Lewis-acid and plays a catalytic role in the nucleophilic acyl substitution of acid anhydrides.

Theoretical investigation into coordination and selectivity of uranyl‐unilateral benzotriazole salophens (X = O/S) for R/S‐triadimefons

“…Recently, two new uranyl‐salophens were characterized where the uranyl ion formed a complex in a twisted planar configuration with a coordination number of four, and the tetra‐coordinated uranyl could still coordinate with other atoms or groups . Due to this particularity of the uranyl‐salophens, their derivatives are widely used in molecular recognition, non‐formation catalysis and enzyme construction . In asymmetric catalysis, Castelli et al .…”

“…[14][15][16][17][18] Due to this particularity of the uranyl-salophens, their derivatives are widely used in molecular recognition, non-formation catalysis and enzyme construction. [19][20][21] In asymmetric catalysis, Castelli et al explored the catalytic performance of asymmetric uranyl-salophen and reaction kinetics of complexes formed by small molecules, finding that the unilateral substituents accompanying the uranyl-salophen derivatives continuously increased, and the association constant between uranyl-salophens and small molecules would gradually increase, which meant that catalytic performances improved. [22] Valeria et al synthesized a salophen ligand derivative incorporating naphthalene and the corresponding uranyl (UO 2 2+ ) complex, and characterized both in solution and in solid-state.…”

Computational insight into asymmetric uranyl‐salophen coordinated with α, β‐unsaturated aldehydes and ketones

“…When uranyl ion forms twisted planar configuration complex with salophen containing four coordination sites, the uranium could still coordinate with other groups or atoms . Thus, uranyl‐salophen was used for many important applications, especially in molecular recognition and enantioselective catalysis . Valeria van axel Castelli et al .…”

“…[9,10] Thus, uranyl-salophen was used for many important applications, especially in molecular recognition and enantioselective catalysis. [11][12][13][14] Valeria van axel Castelli et al [15][16][17] found that association constants and catalytic recognitions of uranyl-salophen substituted by unilateral benzene ring (shown in Figure 1, U-S) to cyclohexenone were higher than those of unsubstituted uranyl-salophen. [18][19][20] We have explored some researches in uranyl-salophens in the recent years.…”

Theoretical investigation into the coordination of R‐/S‐asymmetric uranyl–salophens containing six‐membered ring lactam with cis−/trans‐cyclohexylamines

“…[15][16][17][18][19][20][21][22] Salophen is an important organic ligand containing the imine characteristic group (RC═N), which can form complexes with various metal ions. [23][24][25][26][27] For example, Abdolmaleki et al synthesized a new salophen based on two amino groups, and analyzed both theoretical and experimental results. [28] The coordination complexes of uranyl ions with various structural salophens with asymmetric configuration showed some special catalytic abilities and molecular recognition properties.…”