title: Synthesis of large macrocyclic azacalix[n]pyridines (n = 6 - 9) and their complexation with fullerenes C(60) and C(70).
abstract: Large methylazacalix[n]pyridines (n = 6-9) were synthesized effectively from the Pd-catalyzed macrocyclic fragment coupling reactions between alpha,omega-dibrominated and alpha,omega-diaminated linear oligomers. As macrocyclic host molecules, they formed a 1:1 complex with fullerenes C(60) and C(70) with association constants ranging from 3 x 10(4) to 1 x 10(5) M(-1).
authors.affiliation: Beijing National Laboratory for Molecular Sciences, Laboratory of Chemical Biology, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China.
authors.forename: En-Xuan
authors.initials: EX
authors.lastname: Zhang
authors.forename: De-Xian
authors.initials: DX
authors.lastname: Wang
authors.forename: Qi-Yu
authors.initials: QY
authors.lastname: Zheng
authors.forename: Mei-Xiang
authors.initials: MX
authors.lastname: Wang
mesh_terms: D047250:Calixarenes / Q000138:chemical synthesis* / Q000737:chemistry; D002384:Catalysis; D018360:Crystallography, X-Ray; D037741:Fullerenes / Q000737:chemistry*; D008958:Models, Molecular; D008968:Molecular Conformation; D015394:Molecular Structure; D010165:Palladium / Q000737:chemistry; D011725:Pyridines / Q000138:chemical synthesis* / Q000737:chemistry
chemical_list: D037741:Fullerenes; D011725:Pyridines; D047250:Calixarenes; D010165:Palladium; C069837:fullerene C60