S. No.

U.S./Reflux Under Catalyst

R

R¹

Temp (˚C)

Time (min)

Yield (%)

M.P.(˚C)_rep/M.P.(˚C)_lit

1

HClO₄-SiO₂/reflux [29]

H

C₆H₅

140

10

91

216 [29]

2

MgAl₂O₄/U.S. [33]

H

C₆H₅

60

15

91

216-218 [33]

3

CuFe₂O₄/U.S.

H

C₆H₅

40

15

92(9a)

214-216/216 [29]

4

HClO₄-SiO₂/reflux [29]

p-OCH₃

C₆H₅

-

-

-

Not reported

5

MgAl₂O₄/U.S. [33]

p-OCH₃

C₆H₅

60

18

93

253-254 [33]

6

CuFe₂O₄/U.S.

p-OCH₃

C₆H₅

40

15

94(9b)

254-256/253-254 [33]

7

HClO₄-SiO₂/reflux [29]

H

C₆H₅-CH₂

140

6

96

165-167 [29]

8

MgAl₂O₄/U.S. [33]

H

C₆H₅-CH₂

-

-

-

Not reported

9

CuFe₂O₄/U.S.

H

C₆H₅-CH₂

40

10

95(9c)

166-168/165-167 [29]

10

HClO₄-SiO₂/reflux [29]

p-OCH₃

C₆H₅-CH₂

140

10

96

157-160 [29]

11

MgAl₂O₄/U.S. [33]

p-OCH₃

C₆H₅-CH₂

-

-

-

Not reported

12

CuFe₂O₄/U.S.

p-OCH₃

C₆H₅-CH₂

40

15

94(9d)

158-160/157-160 [29]

13

HClO₄-SiO₂/reflux [29]

p-CH₃

C₆H₅-CH₂

140

6

90

165-168 [29]

14

MgAl₂O₄/U.S. [33]

p-CH₃

C₆H₅-CH₂

-

-

-

Not reported

15

CuFe₂O₄/U.S.

p-CH₃

C₆H₅-CH₂

40

20

96(9e)

168-170/165-168 [29]

16

HClO₄-SiO₂/reflux [29]

p-Cl

C₆H₅-CH₂

140

8

94

162-164/162-165 [29]

17

MgAl₂O₄/U.S. [33]

p-Cl

C₆H₅-CH₂

-

-

-

Not reported

18

CuFe₂O₄/U.S.

p-Cl

C₆H₅-CH₂

40

15

92(9f)

160-162/162-163 [26]

19

HClO₄-SiO₂/reflux [29]

p-Cl

Cyclohexyl

-

-

-

Not reported

20

MgAl₂O₄/U.S. [33]

p-Cl

Cyclohexyl

-

-

-

Not reported

21

CuFe₂O₄/U.S.

p-Cl

Cyclohexyl

40

20

90(9g)

152-154/-

22

HClO₄-SiO₂/reflux [29]

p-CH₃

Cyclohexyl

140

18

90

164 [29]

23

MgAl₂O₄/U.S. [33]

p-CH₃

Cyclohexyl

-

-

-

Not reported

24

CuFe₂O₄/U.S.

p-CH₃

Cyclohexyl

40

20

92(9h)

162-164/164 [29]