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- W4313681176 endingPage "111222" @default.
- W4313681176 startingPage "111222" @default.
- W4313681176 abstract "A single-site macrocyclic pseudo crown ether-manganese complex was generated from the complexation of a new tetradentate ligand brought from a synthetic procedure with manganese (II) halide precursor in an electron-transfer process. The prepared [γ-Fe2O3@LDH/PCE-Mn(II)] acts as an efficient heterogeneous Mn-based catalyst – exhibiting efficient catalytic activity in the synthesis of the functionalized chromeno-pyrimidines via a Biginelli-like annulation process. Moreover, Biginelli reaction of a variety of aryl aldehydes and carbamide/thiocarbamide with a β-ketoester moiety was achieved in ethanol at 60 °C with 65–92% yield in 10–40 min. This catalytic process can be initiated using the Mn(II)-catalyzed in situ generation of an imine intermediate. Subsequently, the addition of a β-ketoester moiety – followed by the ring-closure reaction and removal of a water molecule – forms a library of new chromeno-pyrimidine-2,5-diones/thione products with a broad substrate scope." @default.
- W4313681176 created "2023-01-08" @default.
- W4313681176 creator A5044110530 @default.
- W4313681176 creator A5051487334 @default.
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- W4313681176 date "2023-04-01" @default.
- W4313681176 modified "2023-10-15" @default.
- W4313681176 title "Macrocyclic pseudo crown-ether- manganese (II) complex coated on nanomagnetic LDH- catalyzed Biginelli annulation reactions" @default.
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- W4313681176 doi "https://doi.org/10.1016/j.jpcs.2023.111222" @default.
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