Table 3 Comparison of catalytic activity of Nano-SiO₂/4-(2-Aminoethyl)-morpholine with other catalysts

1

Ru^III@CMC/Fe₃O₄/80 °C/20 min/Solvent-free

92

[60]

2

SBA-15@AMPD-Co /100 °C/35 min/Solvent-free

97

[61]

3

Fe₃O₄@SiO₂@BHA-Cu(II)/50 C/15 min/EtOH

97

[62]

4

PMO-ICS-PrSO₃H/reflux/20 min/EtOH

95

[63]

5

Fe₂O₃@NH₂-SiO₂@Co(II)/ Reflux/14 min/EtOH

95

[64]

6

nano-silica/4-(2-Aminoethyl)-morpholine/70 C/15 min/EtOH/H₂O (2:1)

95

This work