Basic Ionic Liquid as Catalyst in Synthesis of Dimethyl 4-(2-(2,6-Bis(methoxycarbonyl)pyridine-4-yl)vinyl)pyridine-2,6-dicarboxylate

Table 2

Effects of reaction temperature on the reaction.

Entry	Temperature°C	Yield (%)
	30	42
	40	64
	50	78
	60	83
	70	81
	80	82
	90	79
	100	71

Reaction conditions: (25 mmol), tetrahydrofuran 60 ml, [bmim]OH (2.5 mmol), CH₃OH (40 ml), 40 min. yield.