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Liu H.,CAS Shanghai Advanced Research Institute | Li X.-Y.,CAS Shanghai Advanced Research Institute | Zhao X.-L.,East China Normal University | Liu Y.A.,ChemBridge Research Laboratories Inc. | And 4 more authors.
Organic Letters | Year: 2014

Oxacalix[2]arene[2]pyrazine and functional polyether derived oxacalixcrown-6, -7, and -8 were synthesized, and their host-guest complexation with paraquat to form [2]pseudorotaxanes was studied. The [2]pseudorotaxanes were then successfully used in the construction of two oxacalixcrown-tetracationic cyclophane [CBPQT4+] based [2]catenanes. © 2014 American Chemical Society. Source


Xie C.,Southwest University of Science and Technology | Hu W.,CAS Shanghai Advanced Research Institute | Hu W.,University of Chinese Academy of Sciences | Liu Y.A.,ChemBridge Research Laboratories Inc. | And 6 more authors.
Chinese Journal of Chemistry | Year: 2015

An improved partial oxidation of 1,4-dimethoxypillar[5]arene (DMP[5]) was described, through which selected pillar[n]arene[5-n]quinones, such as pillar[4]arene[1]quinone, pillar[3]arene[2]quinone, pillar[2]arene[3]quinone and pillar[1]arene[4]quinone, were synthesized by manipulating the ratio of oxidative reagent (NH4)2[Ce(NO3)6] to DMP[5]. Pillar[5]arene has been selectively oxidized to pillar[n]arene[5-n]quinones in relatively high yields and short reaction time. Copyright © 2015 SIOC, CAS, Shanghai & WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source


Hu W.-B.,East China Normal University | Yang H.-M.,East China Normal University | Hu W.-J.,CAS Shanghai Advanced Research Institute | Ma M.-L.,East China Normal University | And 8 more authors.
Chemical Communications | Year: 2014

A bicyclic host molecule 1 consisting of a pillar[5]arene and a 1,5-dioxynaphthalene-based crown ether unit has been synthesized, and the two cyclic subunits in 1 were found to recognize two different guest molecules (1,4-dicyanobutane and paraquat) selectively or take up the two guest molecules simultaneously. This journal is © the Partner Organisations 2014. Source


Liu H.,CAS Shanghai Advanced Research Institute | Hu W.-J.,CAS Shanghai Advanced Research Institute | Liu Y.A.,ChemBridge Research Laboratories Inc. | Li J.-S.,CAS Shanghai Advanced Research Institute | And 2 more authors.
European Journal of Organic Chemistry | Year: 2015

Pseudorotaxane type host-guest complex of a secondary ammonium salt and oxacalixcrown with the polyether linker as short as five ethylene glycol units was created. While an axle containing both ammonium and carbamate stations was installed in an oxacalixcrown-6-based [2]rotaxane through a threading-followed-by-stoppering approach, translocation of the oxacalixcrown-6 component of the [2]rotaxane from the secondary ammonium station to the carbamate station of the thread was achieved through blocking the amino moiety with a bulky Boc group. A [2]rotaxane R1 (see Scheme) was constructed through a threading-followed-by-stoppering approach. Translocation of the station from the secondary ammonium site to the carbamate site of the thread was achieved through blocking the amino moiety with a bulky Boc group. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source


Hu W.-B.,CAS Shanghai Advanced Research Institute | Hu W.-B.,University of Chinese Academy of Sciences | Hu W.-J.,CAS Shanghai Advanced Research Institute | Liu Y.A.,ChemBridge Research Laboratories Inc. | And 4 more authors.
Organic Letters | Year: 2015

A pillar[5]arene-crown ether fused bicyclic host 1 was found to be able to recognize an imidazolium ion G1 by its pillar[5]arene subunit and a viologen ion G2 by its crown ether receptor discriminatively. The simultaneous binding of G1 and G2 by 1 resulted in the formation of a three-component host-guest complex G1⊂1⊃G2. Negative heterotropic cooperative effects were displayed by G1 and G2 in their binding to 1 and were investigated by stepwise bindings of G1 and G2 to 1. © 2015 American Chemical Society. Source

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