Journals
Publish with us
Publishing partnerships
About us
Blog
Organic Chemistry International
Table of Contents
Organic Chemistry International
/
2014
/
Article
/
Tab 1
/
Research Article
Green Chemistry: New Synthesis of Substituted Chromenes and Benzochromenes
via
Three-Component Reaction Utilizing Rochelle Salt as Novel Green Catalyst
Table 1
Yields and melting points of the synthesized compounds
6
–
8
.
Compound
R
Yield %
Observed m.p.
Reported m.p.
References
6a
2,3-Dimethoxy
85
250
—
—
6b
2,5-Dimethoxy
85
170
—
—
6c
3-Benzyloxyphenyl
86
230
—
—
6d
4-MeO
86
112–114
111-112
[
30
,
32
]
6e
4-Cl
90
184
164
[
30
]
6f
H
80
228
231
[
32
]
6g
3,4,5-Trimethoxy
85
210
205
[
34
]
6h
3-NO
2
84
170
169-170
[
32
]
7a
2,3-Dimethoxy
85
260
—
—
7b
2,5-Dimethoxy
75
240
—
—
7c
3,4,5-Trimethoxy
80
190
189
[
35
]
7d
4-Cl
90
235
232
[
20
]
7e
3-NO
2
82
210
212
[
20
]
7f
H
90
205
205
[
20
]
7g
4-MeO
84
204
205
[
35
]
8a
2,3-Dimethoxy
80
240
—
—
8b
2,4-Dimethoxy
80
205
—
—
8c
2,5-Dimethoxy
75
206
—
—
8d
3,4,5-Trimethoxy
85
209
—
—
8e
3-NO
2
81
195
190
[
29
]
8f
4-MeO
92
260
255
[
26
]
8g
H
90
280
278–280
[
20
]
8h
4-Cl
83
187
191
[
29
]