The oxidative cyclization between acetophenone oxime acetate and phenylacetic acid utilizing different catalysts^a.

Entry	Homogeneous catalyst	Heterogeneous catalyst	Yieldb (%)
1	FeCl3		26
2	FeCl2		6
3	Fe(NO3)3		3
4	FeSO4		13
5	CuSO4		57
6	Cu(NO3)2		8
7	NiSO4		38
8	Co(NO3)2		4
9	La(NO3)2		2
10	Sr(NO3)2		39
11		Cu(BDC)	70
12		ZIF-8A	60
13		UiO-66·TFA	43
14		La2O3	19
15		CoO	11
16		SrO	38
17		LaCoCo3	40
18		La0.6Sr0.4CoO3	83

^aReaction conditions: acetophenone oxime acetate (0.6 mmol), phenylacetic acid (0.2 mmol), DTBP (0.6 mmol), toluene (2 mL), catalyst (5 mol%), 140 °C, under air for 2 h and under argon for 6 h.

^bGC yield.