Table 3.

Benzaldehyde derivatives conversion to isoxazole-5(4H)-ones in the existence of PDAN-Ni@Fe₃O₄.

Entry	Productb	code	Time (min)	Yield %b	M.P (°C)		Ref.
					Observed	Reported
1		4a	60	90	140–142	140–142	[43]
2		4 b	25	95	214–216	211–214	[43]
3		4c	35	92	133–135	135–138	[44]
4		4 d	40	96	140–142	139–140	[44]
5		4e	30	96	108–110	108–109	[44]
6		4f	25	92	265–267	267–270	[43]
7		4 g	45	95	171–173
8		4 h	30	93	135–137	135–136	[45]
9		4i	40	96	174–176	175–177	[43]
10		4j	25	92	212–214	214–216	[43]
11		4 k	30	90	135–137	135–136	[43]
12		4 l	60	93	241–243	242–244	[45]
13		4 m	80	90	174–176	173–174	[46]
14		4n	20	96	226–228	227–228	[43]
15		4o	60	91	202–204	202–203	[43]
16		4p	65	90	144–145	145–146	[45]
17		4q	50	92	146–148	146–147	[43]
18		4r	60	93	238–239	227–229	[46]
		4s	30	95	88–90
		4t	60	90	174–176
19		4u	35	92	159–161	161–162	[44]
20		4v	30	93	214–216	213–215	[44]
21		4w	75	95	225–227	228–226	[47]
22		4×	80	94	211–212	212–215	[44]
23		4 y	40	96	149–151	150–152	[44]
24		4z	45	91	119–121	118–120	[44]
25		4aa	35	95	130–131
26		4 ab	30	96	162–164	168–169	[44]
27		4ac	25	91	196–198	194–196	[47]
28		4ad	40	90	168–170	168–170	[17]
29		4ae	45	92	184–186
30		4af	40	90	167–169	168–169	[47]
31		4 ag	50	91	195–198	189–191	[47]
32		4ah	120	Not detected
33		4ai	120	Not detected
34		4aj	120	Not detected
35		4ak	120	Not detected
36		4 al	120	Not detected

a Reaction conditions: aldehyde (1 mmol), β-ketoester (1 mmol), hydroxylamine hydrochloride (1 mmol), 5 mL water, and PDAN-Ni@Fe₃O₄ (0.04 g) at 50 °C.

^bIsolated yield.