404
K. Singhal and A. Kumar
Table 16.2
(continued)
S. no
NPs
ILs
Catalyst
Product
References
28.
Fe
3 O
4 @SiO
2
HSO
3
Fe
3 O
4 @SiO
2 –HSO
3
N
N
N
H
R
1 O
Me
Me
Fused
dihydropyrimidines
[57]
29.
Fe
3 O
4 /SiO
2
Polyphosphoric acid (PAA)
Fe
3 O
4 /SiO
2 /PAA
O
O
R
Tetrahydrobenzo[a
]xanthenes-11-ones
[58]
(continued)