From: New solid phase methodology for the synthesis of biscoumarin derivatives: experimental and in silico approaches
Entry
Catalyst (mol%)
Time (min)
Yield (%)a
1
-
60
5
2
H2SO4 (15)
35
3
CF3CO2H(10)
50
40
4
CCl3CO2H (10)
55
PTSA(10)
45
6
AlCl3(10)
7
MoO3(10)
20
93
8
MoO3(11)
9
MoO3(12)
10
MoO3(8)
75
11
MoO3(4)
70