Table 3 Comparison of our catalyst with previous reported catalystsa.

From: Captopril supported on magnetic graphene nitride, a sustainable and green catalyst for one-pot multicomponent synthesis of 2-amino-4H-chromene and 1,2,3,6-tetrahydropyrimidine

Entry

Catalyst (mg)

Solvent

Time (min)

Yield %a

References

1

Melamine

H2O/EtOH

25

93

63

2

Aminopropylated silica gel

H2O

90

89

64

3

CuFe2O4@strach

EtOH

20

96

65

4

Fe3O4@MCM‐41@Zr‐piperazine

H2O/EtOH

30

85

66

5

2-Aminopyrine

EtOH

8

92

67

6

MNPs-GO-CysA

H2O/EtOH

15

93

68

7

Fe3O4@SiO2-creatine

EtOH

6

94

43

8

Fe3O4@g-C3N4-Pr-Cap

EtOH

3

96

This work

  1. aAll reactions were performed employing 4-chlorobenzaldehyde (1.0 mmol), malononitrile (1.1 mmol) and dimedone (1.0 mmol).
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