with dibenzo[24]crown‐8. The pseudorotaxane with an alkyne terminal group in the axle component underwent a Cu‐catalyzed Huisgen coupling reaction (click reaction) with an alkyl azide to afford cationic [2]rotaxanes with a triazole group in the axle molecule. The rotaxane reacted with Ac2O to produce neutral rotaxanes with an amide group in the axle component. Both cationic and neutral rotaxanes were treated
Cationic and Neutral Rotaxanes Having Different Functional Groups in the Axle Molecule and Their Coordination to Pt<sup>II</sup>
作者:Gilbert Yu、Yuji Suzaki、Kohtaro Osakada
DOI:10.1002/asia.201601554
日期:2017.2.1
hydrogen bonds between the NH2+ and oxyethylene groups. The neutral rotaxane contains the macrocycle in the vicinity of the terminal aryl group. The co‐conformation of both the cationic and neutral rotaxanes can be fixed by coordination of the triazole group of the axle molecule to PtCl2(dmso)2. A 1HNMRspectroscopicstudy on the thermodynamics of the Pt coordination revealed a larger association constant
Dibenzo [24] crown-8(DB24C8)与具有二烷基铵基团和三唑基团的线性分子以及阳离子轴分子的乙酰化产物形成轮烷。前者的阳离子轮烷是通过NH 2 +和氧乙烯基之间的多个分子间氢键来稳定的。中性轮烷在末端芳基附近包含大环。阳离子和中性轮烷的共构象可以通过将轴分子的三唑基团配位为PtCl 2(dmso)2来固定。A 1对Pt配位的热力学的1 H NMR光谱研究表明,轮烷的缔合常数大于相应的轴分子,而中性轮烷的缔合常数大于阳离子轮烷。