Table 3. Comparison of synthesised Fe₃O₄@BTC as catalyst for the synthesis of dihydropyrano[2,3-c]pyrazoles derivatives with other catalyst.

Entry	Catalyst	Condition	Time (min)	Yield (%)	Ref.
1	PdO/Al-SBA-15	H2O/EtOH, reflux	20	85	62
2	ZnO@PEG, EtOH	Ultrasonication	15	87	63
3	Biochar-Fe3O4–TiO2	EtOH : H2O, 60 °C	10	91	64
4	Y3Fe5O12	Solvent free, 80 °C	20	89	65
5	K09(natural phosphate)	Ethanol, RT	20	85	66
6	γ-Alumina	H2O/reflux	35	90	67
7	Bovine serum albumin (BSA)	90% aq. EtOH	70	95	68
8	Fe 3 O 4 @BTC	Solvent free, sonication	7	92	This work