No.

Schiff base

method

Temp (˚C)

Config. in R2

Yield of Ala (%)

S (e.e. %)

1

8a

A

30

R

49

62

2

A

30

S

29

56

3

A

10

R

47

67

4

A

10

S

33

55

5

A

–10

R

32

42

6

A

–10

S

20

28

7

8b

B

30

R

33

71

8

B

30

S

31

39

9

8c

A

30

R

34

64

10

A

30

S

31

25

11

B

30

R

62

12

B

30

S

30

47

13

A

10

R

30

66

14

A

10

S

36

52

15

A

–10

R

22

57

16

A

–10

S

25

55

17

8d

B

30

R

22

74

18

B

30

S

19

53