Chemistry Reference
In-Depth Information
O
OH
O
OH
SeO
2
1,4-dioxane
SnCl
4
benzene
+
Ac
2
O
S
S
S
SnCl
4
71%
toluene
-
S
PF
6
N
N
O
OH
S
S
S
49
70%
Scheme 51
Synthesis of a
N
-heterocyclic carbene precursor
49
[
69
]
S
S
O
CH
2
OH
HOH
2
C
S
S
S
MeCOCl, AlCl
3
DCM
OHC
CHO
Cl
Cl
S
S
S
S
OH
OH
N
N
S
S
Scheme 52
Synthesis of a 1,2-di(thien-3-yl)ethene with a 2,5-dihydrothiophene bridge [
70
]
Ar
N
R
R
S
S
Fig. 2
A di(thien-3-yl)ethene with a 2,5-dihydropyrrole bridge [
71
]
X
S
N
O
O
O
O
O
AlCl
3
,10
o
C
DCM
O
O
O
+
Cl
S
S
S
50
51
X = Me, Ph, 4-MeOC
6
H
4
,NH
2
,NHPh
Scheme 53
Synthesis of a 5-(coumarin-3-yl)-4-(thien-3-yl)thiazole
51
[
72
]
