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. 2021 Nov 3;7(11):e08309. doi: 10.1016/j.heliyon.2021.e08309

Table 1.

Effect of various catalysts for the preparation of 2-phenylbenzoxazole.a

Image 16
Entry Catalyst Conversionb (%)
1 Fe3O4 26
2 3-(3-(Trimethoxysilyl)propyl)-1H-imidazole-3-ium chloride 44
3 ZnCl2 35
4 FeCl3 30
5 Choline chloride 41
6 LAIL@MNP 82
7 [EMIM]Cl 31
8 [BMIM]BF4 43
a

Reaction conditions: 2-Aminophenol (1.0 mmol), benzaldehyde (1.0 mmol), catalysts (4 mg) under solvent-free sonication at 70 °C for 30 min.

b

Conversion was reported by GC-MS.