Selective monofunctionalization of polyaza[n]paracyclophanes
作者:M.Isabel Burguete、Beatriz Escuder、Santiago V. Luis、Juan F. Miravet、Enrique García-España
DOI:10.1016/0040-4039(94)88432-3
日期:1994.11
A new strategy to the preparation of selectively functionalized polyazamacrocycles is presented. Polyaza[n]paracyclophanes receptors are able to efficiently direct their own selective monofunctionalization upon interaction with simple guests such as metal cations. This enables the preparation of novel receptors functionalized at one of the benzylic nitrogen atoms with a variety of groups.
An efficient synthesis of polyaza[n]paracyclophanes
作者:Andrea Bencini、M. Isabel Burguete、Enrique Garcia-Espana、Santiago V. Luis、Juan F. Miravet、Conxa Soriano
DOI:10.1021/jo00069a049
日期:1993.8
Polyazacyclophanes. 2,6,9,13-Tetraaza[14] paracyclophane as a cationic and anionic receptor
作者:Antonio Andrés、M. Isabel Burguete、Enrique García-España、Santiago V. Luis、Juan F. Miravet、Conxa Soriano
DOI:10.1039/p29930000749
日期:——
The synthesis and characterization of the new azacyclophane, 2,6,9,13-tetraaza[14]paracyclophane, is described. The acid-base behaviour and the metal and anion coordination capabilities of this compound have been studied by potentiometry at 298.15 K in 0.15 mol dm-3 NaClO4, as well as by H-1 and C-13 NMR spectroscopy. The protonation patterns show stabilization effects produced by the presence of the aromatic ring. The aromatic spacer prevents simultaneous involvement of all four nitrogens in the coordination to the metal ions Cu2+ and Zn2+. Stable mono-hydroxylated species have been detected for both metal ions. The triprotonated species is the main one over a wide pH range around neutrality making this ligand a good coordinating agent for such anionic species as ATP4- and P2O74-. Formation of complexed anionic species with degrees of protonation varying from three to six has been detected.
Guest-Induced Selective Functionalization of Polyaza[<i>n</i>]paracyclophanes
作者:M. Isabel Burguete、Beatriu Escuder、Juan C. Frías、Enrique García-España、Santiago V. Luis、Juan F. Miravet
DOI:10.1021/jo971329e
日期:1998.3.1
A new strategy to the preparation of selectively functionalized polyazamacrocycles is presented. Polyaza[n]paracyclophane receptors are able to efficiently direct their own selective functionalization upon interaction with simple guests such as metal cations. This enables the preparation of novel receptors functionalized at one of the benzylic nitrogen atoms with a variety of groups. Selective difunctionalization at both benzylic positions can also be achieved in this way.
Burguete, M. Isabel; Garcia-Espana, Enrique; Luis, Santiago V., Chemical Communications, 1998, # 17, p. 1823 - 1824
作者:Burguete, M. Isabel、Garcia-Espana, Enrique、Luis, Santiago V.、Miravet, Juan F.、Paya, Lorena、Querol, Manuel、Soriano, Conxa