S. no

X in aldehyde

Y in aldehyde

Z in aldehyde

Product

Time (min)

Yield

1

Cl

H

H

4a

30

94

2

OH

OC2H5

H

4b

35

93

3

OH

H

H

4c

30

89

4

CH3

H

H

4d

40

90

5

H

H

H

4e

35

88

6

NO2

H

H

4f

40

91

7

H

H

NO2

4g

40

92

8

H

H

OCH3

4h

30

89