Synthesis of Strained Macrocyclic Biaryls for Enthalpy-Driven Ring-Opening Polymerization
摘要:
Polymerizable macrocyclic biarylene-ether-ketones and biarylene-ether-sulfones are accessible from linear, bis(chloro)-terminated oligomers via nickel-catalyzed, intramolecular coupling under pseudo-high-dilution conditions. Single-crystal X-ray analyses of the resulting cyclo-oligomers reveal extremely distorted and highly strained geometries, with 4,4 '-biphenylene units showing deviations of up to 70 degrees from linearity.
Synthesis, structure, and ring-opening polymerisation of strained macrocyclic biaryls: a new route to high-performance materials
作者:Howard M. Colquhoun、Christopher C. Dudman、Mark Thomas、Caroline A. O'Mahoney、David J. Williams
DOI:10.1039/c39900000336
日期:——
A series of new, all-aromatic, macrocyclicbiaryls have been obtained by intramolecular, nickel-promoted coupling of bis(4-chlorobenzoylphenoxy)-terminated oligomers, and single-crystal X-ray analysis of one such macrocycle reveals extreme distortion of the biaryl unit; these highly strainedmaterials undergo rapid ring-openingpolymerisation in the presence of nucleophilic initiators to give high
Synthesis of Strained Macrocyclic Biaryls for Enthalpy-Driven Ring-Opening Polymerization
作者:Howard M. Colquhoun、Zhixue Zhu、Christopher C. Dudman、Caroline A. O'Mahoney、David J. Williams、Michael G. B. Drew
DOI:10.1021/ma0517796
日期:2005.12.1
Polymerizable macrocyclic biarylene-ether-ketones and biarylene-ether-sulfones are accessible from linear, bis(chloro)-terminated oligomers via nickel-catalyzed, intramolecular coupling under pseudo-high-dilution conditions. Single-crystal X-ray analyses of the resulting cyclo-oligomers reveal extremely distorted and highly strained geometries, with 4,4 '-biphenylene units showing deviations of up to 70 degrees from linearity.