6.3.3 Applications in Molecular Recognitions and Self-Assemblies
Since (+)-67 and (À)-67 contain electron-rich cavities and six hydroxyl groups, we
deduced they could efficiently and enantioselectively complex with chiral organic
ammonium salts by multiple non-covalent interactions including cation-π interaction. So, we tested the complexation between the chiral hosts and three pairs of chiral
guests 72–74 (Fig. 23) and found, even without any modification, the chiral
Fig. 21 Crystal structure of (Æ)-67
Fig. 22 Crystal structures of 68a (a) and (+)-P-70 (b)
N
+
N
+
N
+
O
O
O
O
N
+
O
O
O
O
N
+
N
+
R-72
S-74
R-73
S-73
S-72
R-74
PF 6
−
PF 6
−
PF 6
−
PF 6
−
PF 6
−
PF 6
−
Fig. 23 Structures of chiral guests 72–74
6 Triptycene-Derived Macrocyclic Arenes
171
Since (+)-67 and (À)-67 contain electron-rich cavities and six hydroxyl groups, we
deduced they could efficiently and enantioselectively complex with chiral organic
ammonium salts by multiple non-covalent interactions including cation-π interaction. So, we tested the complexation between the chiral hosts and three pairs of chiral
guests 72–74 (Fig. 23) and found, even without any modification, the chiral
Fig. 21 Crystal structure of (Æ)-67
Fig. 22 Crystal structures of 68a (a) and (+)-P-70 (b)
N
+
N
+
N
+
O
O
O
O
N
+
O
O
O
O
N
+
N
+
R-72
S-74
R-73
S-73
S-72
R-74
PF 6
−
PF 6
−
PF 6
−
PF 6
−
PF 6
−
PF 6
−
Fig. 23 Structures of chiral guests 72–74
6 Triptycene-Derived Macrocyclic Arenes
171