Skip to main content

Table 2 Condensation of 2a and 3a in the presence of different reaction conditions

From: Ultrasound-assisted synthesis of 2,4-thiazolidinedione and rhodanine derivatives catalyzed by task-specific ionic liquid: [TMG][Lac]

Entry

Catalyst

Time (min)

Yield a

1

No catalyst + No Heating + No US

180

-

2

No catalyst + Heating (50°C)

180

-

3

Catalyst (20 mol%) + Heating (50°C)

60

<55

4

Catalyst (20 mol%) + Heating (80°C)

60

68

5

No catalyst + Heating (50°C) + US

120

<10

6

Catalyst (20 mol%) + No Heating + US

50

74

7

Catalyst (50 mol%) + No Heating + US

50

72

8

Catalyst (20 mol%) + Heating (50°C) + US

40

80

9

Catalyst (20 mol%) + Heating (80°C) + US

20

95

10

Catalyst (20 mol%) + Heating (100°C) + US

30

92

  1. The different reaction conditions are as follows: 1a (1 mmol), 2a (1 mmol), and catalysts were irradiated under ultrasound irradiations (US) at different temperatures. aIsolated yield.