Arl Br

R1

Reagent

Product

Yield (%)a*

Yield (%)b*

H

2a

3a

32

87

H

2b

3b

36

82

H

2c

3c

39

86

4-CH3

2d

3d

35

84

H

2e

3e

34

81

H

2f

3f

32

93

H

2g

3g

31

77

4-CH3O

2h

3h

41

93

4-Cl

2i

3i

40

91

4-CH3O

2j

3j

37

89

H

2k

3k

39

92

4-CH3O

2l

3l

37

88

4-Cl

2m

3m

37

91

4-CH3

2n

3n

33

80