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Selective synthesis of two constitutionally isomeric oriented calix[6]arene-based rotaxanes
被引:84
|作者:
Arduini, A
[1
]
Ciesa, F
[1
]
Fragassi, M
[1
]
Pochini, A
[1
]
Secchi, A
[1
]
机构:
[1] Univ Parma, Dipartimento Chim Organ & Ind, I-43100 Parma, Italy
关键词:
calixarenes;
rotaxanes;
self-assembly;
solvent effects;
supramolecular chemistry;
D O I:
10.1002/anie.200461336
中图分类号:
O6 [化学];
学科分类号:
0703 ;
摘要:
Only in apolar media is the calix[6]arene wheel threaded from its upper rim by asymmetric bipyridinium axles. This leads to the formation of oriented pseudorotaxanes. Their stoppering with a different stopper yields rotaxanes characterized by the unequivocal orientation of the wheel rims with respect to the two different stoppers (see picture, R1= CHPh2/CHCy2, R2= CHCy2/CHPh2, Cy = cyclohexyl, Ts = toluene-4-sulfonyl).
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页码:278 / 281
页数:4
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