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Journal of Chemistry
/
2020
/
Article
/
Tab 1
/
Research Article
Metal-free Catalyzed One-Pot Multicomponent Synthesis of (E)-3-(2-((5-(Benzylideneamino)-1,3,4-thiadiazol-2-yl)thio) Acetyl)-2
H
-chromen-2-one Derivatives and Their Biological Evaluation
Table 1
Physical data of compounds (
4a-h
and
5
).
Compounds
4a-h
and
5
R
1
R
2
R
3
R
4
Molecular formula
Molecular weight g mol
−1
Yield (%) method
M.P. (°C)
I
II
a
H
H
H
H
C
20
H
13
N
3
O
3
S
2
407.47
70
65
218–220
b
H
H
CH
3
H
C
21
H
15
N
3
O
3
S
2
421.49
86
80
223–225
c
H
H
H
NO
2
C
20
H
12
N
4
O
5
S
2
452.46
83
71
215–217
d
H
H
OCH
3
H
C
21
H
15
N
3
O
4
S
2
437.49
84
76
219–221
e
Cl
H
Cl
H
C
20
H
11
N
3
O
3
S
2
Cl
2
476.36
80
66
235–237
f
Cl
H
H
H
C
20
H
12
N
3
O
3
S
2
Cl
441.91
83
70
234–236
g
H
H
H
OCH
3
C
21
H
15
N
3
O
4
S
2
437.49
84
78
225–227
h
H
H
Br
H
C
20
H
12
BrN
3
O
3
S
2
486.36
80
76
241–243
5
—
—
—
—
C
13
H
9
N
3
O
3
S
2
319.36
85
—
212–215