Table 3.

Investigations on effective parameters for the transesterification reaction of n‐butyl benzoate with methanol catalyzed by [TAIm]OH ionic liquid^[a]

Entry	Ionic liquid: butyl benzoate: MeOH (mmol)[b]	T [°C]	Time [h]	pH	Conversion [%][c]
1	10: 5: 5	Reflux[d]	7	13.68	70
2	10: 5: 20	Reflux[d]	5	13.57	92
3	10: 5: 30	Reflux[d]	5	13.52	80
4	20: 5: 10	Reflux[d]	5	13.21	98
5	5: 5: 10	Reflux[d]	5	13.40	75
6	10: 5 : 10	Reflux[d]	5	13.36	98
7	10: 5: 10	40	10	13.37	60
8	10: 5: 10	R.T.	10	13.36	20

[a] Reaction conditions: n‐butyl benzoate, MeOH, ionic liquid, temperature, sealed tube. [b] mmol of ionic liquid is based on mmol of hydroxide ions in the ionic liquid. [c] GC conversion. [d] 65 °C.