Table 3.

Role of the base in the reaction ^a.

Entry	Base	Yield (%)
1	-	15
2	NaOAc	54
3	Na2CO3	25
4	K2CO3	25
5	KOH	92

^a Reaction conditions: 0.268 mmol of 1a (1 eq), 0.161 mmol of TBAB (0.6 eq), 0.563 mmol (2 eq) of base, and 2% w/w of catalyst in 2.5 mL of water under MW irradiation (T = 100 °C, 30 min).