Table 1 Effect of solvent and catalyst loading in the Knoevenagel reaction.

From: Amine functionalized magnetic resorcinol formaldehyde as a green and reusable nanocatalyst for the Knoevenagel condensation

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Entry

Catalyst

Catalyst loading (g)

Solvent

Temperature (°C)

Time (min)

Yield (%)a

1

–

–

EtOH

60

60

–

2

Fe3O4@RF/Pr-NH2

0.01

H2O

60

30

72

3

Fe3O4@RF/Pr-NH2

0.01

Solvent-free

60

30

78

4

Fe3O4@RF/Pr-NH2

0.01

EtOH

60

30

95

5

Fe3O4@RF/Pr-NH2

0.005

EtOH

60

30

53

6

Fe3O4@RF/Pr-NH2

0.015

EtOH

60

30

96

7

Fe3O4@RF/Pr-NH2

0.01

EtOH

25

30

12

8

Fe3O4@RF/Pr-NH2

0.01

EtOH

40

30

63

9

Fe3O4@RF/Pr-NH2

0.01

EtOH

80

30

95

10 b

-

-

EtOH

60

60

23

11b

Fe3O4@RF/Pr-NH2

0.01

EtOH

60

30

96

  1. aIsolated yields. bMalononitrile (1 mmol) was used as substrate.
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