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Volumn 9, Issue 3, 2003, Pages 793-799

Unidirectional threading of triphenylureidocalix[6]arene-based wheels: Oriented pseudorotaxane synthesis

Author keywords

Calixarenes; Host guest systems; Oriented pseudorotaxanes; Rotaxanes; Unidirectional threading

Indexed keywords

COMPLEXATION; PROTONS; SALTS; SYNTHESIS (CHEMICAL); WHEELS;

EID: 0037415906     PISSN: 09476539     EISSN: None     Source Type: Journal    
DOI: 10.1002/chem.200390089     Document Type: Article
Times cited : (95)

References (40)
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    • note
    • 3CN (9:1) showed broader signals although with almost identical chemical shifts for all proton systems.
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    • note
    • Addition of an excess of wheel 5a to the 1:1 host-guest adduct showed the presence of "empty" and threaded wheel.
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    • For ion-pairs recognition see for example: a) D. Beer, P. A. Gale, Angew. Chem. 2001, 113 502-532; Angew. Chem. Int. Ed. 2001, 40, 486-516;
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    • As observed by other authors, elemental analysis of calixarenes are very often incorrect. Nevertheless the spectral data were in full agreement with the proposed structure of these new compounds (see Supporting Information). See for example: a) V. Böhmer, K. Jung, M. Schon, A. Wolff, J. Org. Chem. 1992, 57, 790-792;
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    • note
    • 6. Since, because of their size, the stoppers can not pass through the calixarene annulus, a tentative explanation for the decomposition could be a partial hydrolysis of the ester functions that link the cationic axle to the stoppers. A similar behaviour was also observed by Kaifer and Insnin in ref. [6b].


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.