M-Type SrFe₁₂O₁₉ Ferrite: An Efficient Catalyst for the Synthesis of Amino Alcohols under Solvent-Free Conditions

Table 2

Catalytic epoxide ring-opening of cyclohexene oxide as symmetric epoxide.

Entry	Solvent	C/S mol (%)	T (°C)	Conversion^a (%)	Selectivity^b (%)
1	Solvent-free	0.92	80	100	100
2	Water	0.92	80	80	80
3	Methanol	0.92	80	80	80
4	THF	0.92	80	None	None
5	Acetonitrile	0.92	80	None	None
6	Solvent-free	None	80	19	19
7	Solvent-free	0.64	80	28	28
8	Solvent-free	1.38	80	96	96
9	Solvent-free	1.84	80	79	79
10	Solvent-free	0.92	60	100	100
11	Solvent-free	0.92	50	96	96
12	Solvent-free	0.92	40	96	95
13	Solvent-free	0.92	25	20	20

Reaction conditions: solvent (1 mL), reaction time 17 h, cyclohexene oxide (1.02 mmol), and aniline (1.1 mmol). ^aConversion and ^bselectivity were determined by GC.