Table 2 The effect of solvent, time, temperature, and catalyst loading in the synthesis of tetrahydrobenzo[b]pyran.

From: Design and catalytic performance of a novel two-dimensional copper metal-organic framework for green synthesis of tetrahydrobenzo[b]pyrans

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Entry

Catalyst (g)

Solvent

Time (min)

T (°C)

Yield (%)

1

-

H2O

120

35

No reaction

2

-

EtOH

120

35

No reaction

3

(0.06)

H2O

60

35

70

4

(0.06)

EtOH

60

35

55

5

(0.06)

Toluene

60

35

25

6

(0.06)

Solvent-free

60

35

34

7

(0.06)

H2O/EtOH(1:1)

60

35

95

8

(0.06)

H2O/EtOH(1:2)

60

35

95

9

(0.06)

H2O/EtOH(1:1)

40

35

95

10

(0.06)

H2O/EtOH(1:1)

30

35

95

11

(0.06)

H2O/EtOH(1:1)

25

35

95

12

(0.04)

H2O/EtOH(1:1)

25

35

82

13

(0.02)

H2O/EtOH(1:1)

25

35

75

14

(0.1)

H2O/EtOH(1:1)

25

35

95

15

(0.06)

H2O/EtOH(1:1)

25

60

84

16

(0.06)

H2O/EtOH(1:1)

25

80

79

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