0000000000202526

AUTHOR

Hongqi Tao

showing 7 related works from this author

Efficient synthesis of copillar[5]arenes and their host–guest properties with dibromoalkanes

2011

An efficient method for the synthesis of copillar[5]arenes was developed with FeCl(3) as catalyst and different 1,4-dialkoxybenzenes and paraformaldehyde as reactants (yields: 50-85%). The host-guest property of (co)pillar[5]arenes and terminal dibromoalkanes was investigated by (1)H NMR measurements and an X-ray study. The complexation behavior of the copillar[5]arenes can be tuned by changing the substituents on the host. A complete complexation selectivity was found between pillar[5]- and pillar[6]arenes, which is an interesting aspect for sensor techniques.

ChemistryOrganic ChemistryPillarProton NMROrganic chemistryPhysical and Theoretical ChemistrySelectivityBiochemistryCombinatorial chemistryCatalysisOrganic & Biomolecular Chemistry
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Synthesis and Conformational Properties of Nonsymmetric Pillar[5]arenes and Their Acetonitrile Inclusion Compounds

2010

The catalytic cyclocondensation of 1-butoxy-4-methoxy-2,5-bis(methoxymethyl)benzene (1d) affords a statistical mixture of the regioisomeric pillar[5]arenes 3a–d in high yield. The alkoxy groups are arranged stereoselectively in a mode so that they avoid steric interactions. The rotation of the benzene rings is, at room temperature, fast in terms of the NMR timescale and leads to a de facto Cs symmetry for 3a–c and a C5h symmetry for 3d. All four structural isomers can encapsulate two CH3CN guest molecules. The structure determinations are based on four crystal structure analyses (constitutions) and NMR spectroscopic measurements (conformations).

Steric effectsChemistryStereochemistryOrganic ChemistryRegioselectivityCrystal structureInclusion compoundCrystallographychemistry.chemical_compoundAlkoxy groupStructural isomerMoleculePhysical and Theoretical ChemistryHost–guest chemistryEuropean Journal of Organic Chemistry
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CCDC 821446: Experimental Crystal Structure Determination

2012

Related Article: Luzhi Liu, Derong Cao, Yi Jin, Hongqi Tao, Yuhui Kou, H.Meier|2011|Org.Biomol.Chem.|9|7007|doi:10.1039/c1ob05871a

Space GroupCrystallographyCrystal SystemCrystal Structure491419242628303234-Decamethoxyhexacyclo-[21.2.2.236.2811.21316.21821]pentatriaconta-1(25)3581013151820232628303234-pentadecaene 16-dibromohexane clathrateCell ParametersExperimental 3D Coordinates
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CCDC 777752: Experimental Crystal Structure Determination

2011

Related Article: Yuhui Kou, Hongqi Tao, Derong Cao, Zhiyong Fu, D.Schollmeyer, H.Meier|2010|Eur.J.Org.Chem.|2010|6464|doi:10.1002/ejoc.201000718

49141926-Pentabutoxy-2428303234-pentamethoxyhexacyclo[21.2.2.2^36^.2^811^.2^1316^.2^1821^]pentatriaconta-1(25)358101315182023262830323 4-pentadecaenebis(acetonitrile) clathrateSpace GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 795257: Experimental Crystal Structure Determination

2011

Related Article: Yuhui Kou, Hongqi Tao, Derong Cao, Zhiyong Fu, D.Schollmeyer, H.Meier|2010|Eur.J.Org.Chem.|2010|6464|doi:10.1002/ejoc.201000718

Space GroupCrystallographyCrystal System49192630-pentabutoxy-1424283234-pentamethoxyhexacyclo[21.2.2.2^36^.2^811^.2^1316^.2^1821^]pentatriaconta-1(25)3581013151820232628303234-pentadecaene bis(acetonitrile) clathrateCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 777751: Experimental Crystal Structure Determination

2011

Related Article: Yuhui Kou, Hongqi Tao, Derong Cao, Zhiyong Fu, D.Schollmeyer, H.Meier|2010|Eur.J.Org.Chem.|2010|6464|doi:10.1002/ejoc.201000718

49142628-pentabutoxy-1924303234-pentamethoxyhexacyclo[21.2.2.2^36^.2^811^.2^1316^.2^1821^]pentatriaconta-1(25)3581013151820232628303234-pentadecaene bis(acetonitrile) clathrateSpace GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 777753: Experimental Crystal Structure Determination

2011

Related Article: Yuhui Kou, Hongqi Tao, Derong Cao, Zhiyong Fu, D.Schollmeyer, H.Meier|2010|Eur.J.Org.Chem.|2010|6464|doi:10.1002/ejoc.201000718

Space GroupCrystallographyCrystal System49141924-pentabutoxy-2628303234-pentamethoxyhexacyclo[21.2.2.2^36^.2^811^.2^1316^.2^1821^]pentatriaconta-1(25)3581013151820232628303234-pentadecaene bis(acetonitrile) clathrateCrystal StructureCell ParametersExperimental 3D Coordinates
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