2. Evaluation of Various Catalysts in the N-Alkylation Reaction of BIT to Prepare BBIT .

Entry	Catalysts	Conversion (%)	Selectivity (%)	Yield (%)	Standard deviation
1	None	15.89	59.96	9.53	0.65
2	Al2O3	3.97	35.27	1.40	2.03
3	MgO	26.97	74.39	20.06	1.06
4	NaOH	70.10	48.36	33.90	2.56
5	Cs/Al2O3	11.57	36.10	5.13	3.11
6	Mg/LTA	40.15	60.19	25.14	2.16
7	K/LTA	51.69	64.34	36.42	1.96
8	5%Cs/LTA	69..48	71.17	49.45	2.03
9	Mg4Al1-LDH	62.87	18.71	11.76	2.33
10	Mg4Al1O-600	61.66	69.42	42.81	1.89

^aReaction conditions: BIT 0.0033 mol, BrBu 0.0066 mol, air, 100 °C, 20 h.