Table 1 Synthesis of benzocoumarin-stilbene hybrid system via HWE reaction.

From: A Novel Benzocoumarin-Stilbene Hybrid as a DNA ligase I inhibitor with in vitro and in vivo anti-tumor activity in breast cancer models

Comp. No

R1

R2

R3

R4

R5

R6

Yield (%)

10

H

H

H

H

H

H

95

11

H

H

H

OCH3

H

H

80

12

H

H

H

N(CH3)2

H

H

75

13

H

H

H

NO2

H

H

96

14

H

H

H

CN

H

H

92

15

H

H

H

H

OCH3

H

85

16

H

OCH3

H

H

H

OCH3

90

17

H

H

OCH3

OCH3

H

H

82

18

H

H

OCH3

OCH3

OCH3

H

86

19

H

H

OCH 3

H

OCH 3

H

95

20

H

H

OCH3

H

H

OCH3

80

21

H

H

H

OCH3

H

OCH3

78

22

OCH3

H

H

H

H

H

92

23

OCH3

H

H

OCH3

H

H

80

24

OCH3

H

H

NO2

H

H

94

25

OCH3

H

H

CN

H

H

92

26

OCH3

H

OCH3

H

OCH3

H

84

27

OCH3

H

OCH3

OCH3

H

H

82

28

OCH3

OCH3

H

H

H

OCH3

78

29

OCH3

H

OCH3

H

H

OCH3

75

30

OCH3

H

H

OCH3

H

OCH3

72

31

OCH3

H

OCH3

OCH3

OCH3

H

82

32

CH3

H

H

H

H

H

95

33

CH3

H

H

NO2

H

H

95

34

CH3

H

OCH3

H

OCH3

H

95

35

CH3

H

H

OCH3

H

OCH3

80

36

CH3

H

OCH3

H

H

OCH3

75

37

CH3

OCH3

H

H

H

OCH3

72

38

CH3

H

OCH3

OCH3

OCH3

H

76

39

CH3

H

H

OCH3

OCH3

H

70