E-factor minimized protocols for the polystyryl-BEMP catalyzed conjugate additions of various nucleophiles to α,β-unsaturated carbonyl compounds
作者:Simona Bonollo、Daniela Lanari、Julie M. Longo、Luigi Vaccaro
DOI:10.1039/c1gc16088e
日期:——
Efficient protocols for the addition of carbon-, sulphur- and nitrogen-nucleophiles to α,β-unsaturated carbonylcompounds catalyzed by PS-BEMP have been reported. The adoption of solvent-free conditions (SolFC) was crucial for improving the efficiency of all the processes, while by using an organic reaction medium poor results were obtained. Addition reactions were performed by using equimolar amounts
Mild and Efficient Procedure for Michael Addition of N-Heterocycles to <font>α</font>,<font>β</font>-Unsaturated Compounds Using Anhydrous K<sub>3</sub>PO<sub>4</sub> as Catalyst
Imidazole, 1,2,4-triazole, indole, and benzotriazole undergo conjugate additions with , -unsaturated carbonyl compounds in the presence of anhydrous potassium phosphate at ambient temperature to afford the corresponding Michael adducts in excellent yields.
Sodium trifluoroacetate mediated copper-catalyzed aza-Michael addition of α,β-unsaturated olefins with aromatic amines
作者:S. Erfan Masaeli、Mohsen Teimouri、Bhupendra Adhikari、Mahshid Attarroshan、James W. Akin、Selvam Raju、Sean L. Stokes、Joseph P. Emerson
DOI:10.1016/j.tetlet.2023.154520
日期:2023.6
We present a sodium trifluoroacetate (CF3CO2Na) mediated copper-catalyzed aza-Michaeladdition of aromaticamines with activated olefins under mild, aqueous reaction conditions. This simplistic protocol employs a copper catalyst (10 mol%) and water as solvent. This transformation occurs precisely with aromatic substituted amines containing both electron-donating (EDG) and electron-withdrawing (EWG) groups
Lubricating compositions comprising an azole-acrylic adduct formed by contacting an azole compound with an acrylic. The adduct formed has at least one nitrogen-alkyl group comprising at least one acyl. The lubricating composition also comprises an antiwear agent and an antioxidant. Methods of lubricating an internal combustion engine comprising contacting the internal combustion engine with the lubricating composition comprising an azole-acrylic adduct formed by contacting an azole compound with an acrylic. Methods of reducing corrosion and/or seal deterioration in an internal combustion engine. The use of an azole-acrylic adduct in a lubricating composition to reduce corrosion and/or seal deterioration in an internal combustion engine.