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Volumn 133, Issue 31, 2011, Pages 12298-12303

En route to a molecular sheaf: Active metal template synthesis of a [3]rotaxane with two axles threaded through one ring

Author keywords

[No Author keywords available]

Indexed keywords

ACTIVE METALS; ACTIVE TEMPLATE; ALKYL CHAIN; EN-ROUTE; END GROUPS; GENERAL METHOD; HOMOCOUPLING REACTIONS; MACROCYCLES; RING SIZES; ROTAXANES; TEMPLATE SYNTHESIS;

EID: 79961157517     PISSN: 00027863     EISSN: 15205126     Source Type: Journal    
DOI: 10.1021/ja205167e     Document Type: Article
Times cited : (65)

References (86)
  • 43
    • 73249141484 scopus 로고    scopus 로고
    • For recent reviews on polymeric rotaxanes with multiple rings encircling linear or branched threads, see
    • For recent reviews on polymeric rotaxanes with multiple rings encircling linear or branched threads, see: Harada, A.; Hashidzume, A.; Yamaguchi, H.; Takashima, Y. Chem. Rev. 2009, 109, 5974-6023
    • (2009) Chem. Rev. , vol.109 , pp. 5974-6023
    • Harada, A.1    Hashidzume, A.2    Yamaguchi, H.3    Takashima, Y.4
  • 58
    • 4544231480 scopus 로고    scopus 로고
    • The ternary supramolecular complexes cited in ref 5 are all thermodynamically stable with respect to their decomplexed components, but kinetically labile in solution (the guests undergo exchange with others in the bulk). In contrast, [3]rotaxane 5 - which is a molecule not a supramolecular complex (Hannam, J. S.; Lacy, S. M.; Leigh, D. A.; Saiz, C. G.; Slawin, A. M. Z.; Stitchell, S. G. Angew. Chem., Int. Ed. 2004, 43, 3260-3264)- is kinetically stable to dethreading but, with no significant favorable interactions between the components, certainly thermodynamically unstable with respect to its non-interlocked components
    • (2004) Angew. Chem., Int. Ed. , vol.43 , pp. 3260-3264
    • Hannam, J.S.1    Lacy, S.M.2    Leigh, D.A.3    Saiz, C.G.4    Slawin, A.M.Z.5    Stitchell, S.G.6
  • 81
    • 79961158226 scopus 로고    scopus 로고
    • An optimized 46% yield of [2]rotaxane was reported in ref 8n using the bisoxazoline macrocycle and 2.2 equiv of alkyl bromide at room temperature in DMF. In the present study with the terpyridyl-macrocycle (1), the use of a 1:1 mixture of THF-NMP enabled all of the reactants to be in solution at the start of the reaction. Heating to 60 °C was necessary to allow reactions with >5 equiv of 2 to reach completion within 18 h. The proportion of interlocked and non-interlocked products was unchanged when the reactions were carried out with DMF as solvent and/or at room temperature (other conditions as for Table 1, entry 2)
    • An optimized 46% yield of [2]rotaxane was reported in ref 8n using the bisoxazoline macrocycle and 2.2 equiv of alkyl bromide at room temperature in DMF. In the present study with the terpyridyl-macrocycle (1), the use of a 1:1 mixture of THF-NMP enabled all of the reactants to be in solution at the start of the reaction. Heating to 60 °C was necessary to allow reactions with >5 equiv of 2 to reach completion within 18 h. The proportion of interlocked and non-interlocked products was unchanged when the reactions were carried out with DMF as solvent and/or at room temperature (other conditions as for Table 1, entry 2).
  • 82
    • 79961135712 scopus 로고    scopus 로고
    • Two-ring-one-thread [3]rotaxanes have previously been observed as byproducts in Cu-catalyzed azide-alkyne cycloaddition (CuAAC) active metal template reactions, see ref 8d
    • Two-ring-one-thread [3]rotaxanes have previously been observed as byproducts in Cu-catalyzed azide-alkyne cycloaddition (CuAAC) active metal template reactions, see ref 8d.
  • 86
    • 79961133309 scopus 로고    scopus 로고
    • A "sheaf" (plural: sheaves) is a bundle of objects held together by a band or other mechanical binder. Familiar examples include the way that wheat, rye, and other cereals are traditionally bound with straw or twine after reaping
    • A "sheaf" (plural: sheaves) is a bundle of objects held together by a band or other mechanical binder. Familiar examples include the way that wheat, rye, and other cereals are traditionally bound with straw or twine after reaping.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.