Heterogeneous Catalysts in Pictet-Spengler-Type Reactions
Table 1
The aforementioned solids’ specific area and acidity.
Entry
Solid
Surface area (m2/g)
Acidity (mmol NH3/100 g)
1
B
50
21.6
2
Ca-B
48
21.1
3
H-B
82
30.9
4
AlPB
139
29.0
5
AlZrPV
208
36.7
6
MO
246
17.8
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