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. 2023 Feb 13;13:2564. doi: 10.1038/s41598-023-29598-6

Table 2.

Effect of some parameters (solvent and amount of catalyst) for the preparation of 4a.

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Entry Catalyst (mg) Solvent Temperature (°C) Time (min) Yield (%)
1 Fe3O4@CPTMO-phenylalanine-Ni (0) Water Reflux 720 0
2 Fe3O4@CPTMO-phenylalanine-Ni (30) Water Reflux 25 85
3 Fe3O4@CPTMO-phenylalanine-Ni (30) Acetone Reflux 30 80
4 Fe3O4@CPTMO-phenylalanine-Ni (20) Water/Acetone (2:1) 80 30 88
5 Fe3O4@CPTMO-phenylalanine-Ni (30) Water/Acetone (2:1) 80 3 98
6 Fe3O4@CPTMO-phenylalanine-Ni(30) Ethanol Reflux 45 70
7 Fe3O4@CPTMO-phenylalanine-Ni (30) n-Hexane Reflux 60 43
8 Fe3O4@CPTMO-phenylalanine-Ni (40) Water/Acetone (2:1) 80 30 90
9 Fe3O4 (30) Water/Acetone (2:1) 80 300 68
10 Fe3O4@CPTMO (30) Water/Acetone (2:1) 80 250 78
11 Fe3O4@CPTMO-phenylalanine (30) Water/Acetone (2:1) 80 180 82