Template Synthesis of [2]Rotaxanes with Large Ring Components and Tris(biphenyl)methyl Group as the Blocking Group. The Relationship between the Ring Size and the Stability of the Rotaxanes
作者:Shinichi Saito、Kazuko Nakazono、Eiko Takahashi
DOI:10.1021/jo060829h
日期:2006.9.1
phenanthrolines 3a−e and a tris(biphenyl)methyl derivative 4. [2]Rotaxanes with large ring components (10a,b) were synthesized by the template method, and the stability of the rotaxanes was examined. The study revealed that the tris(biphenyl)methyl group is an effective blockinggroup for the rotaxanes with up to a 33-membered ring. Even a rotaxane with a 37-membered macrocyclic phenanthroline (10b) could
作者:Steffen L. Woltering、Przemyslaw Gawel、Kirsten E. Christensen、Amber L. Thompson、Harry L. Anderson
DOI:10.1021/jacs.0c05308
日期:2020.8.5
in quantitative dimerization via [2+2] cycloaddition to form a [3]-ladderane; irradiation of this ladderane at 250 nm generates a dihydrotriphenylene, which can be oxidized easily to a triphenylene. Irradiation of the indane-based MAE at 350 nm in the presence of traces of oxygen forms an endoperoxide and a bisepoxide. Both MAEs have been incorporated into rotaxanes via copper-mediated active metal
聚炔聚轮烷的合成需要大量的光不稳定掩蔽炔烃等价物 (MAE),作为绝缘分子线和碳炔的线性聚合物同素异形体的稳定形式。我们合成了一种基于菲的新型 MAE,并将其与基于茚满的 MAE 进行了比较。在不同波长(250 nm 和 350 nm)下研究了模型化合物的光化学暴露,并通过核磁共振光谱和 X 射线晶体学鉴定了关键产物。250 nm 的紫外线照射导致两种 MAE 的暴露。菲体系在 350 nm 下的辐照导致通过 [2+2] 环加成形成 [3]-ladderane 的定量二聚化;这种梯烷在 250 nm 下的辐射会产生二氢苯并苯,它可以很容易地被氧化成苯并苯。在痕量氧存在下以 350 nm 辐照茚满基 MAE 形成内过氧化物和双环氧化物。两种 MAE 均已通过铜介导的活性金属模板 Glaser 或 Cadiot-Chodkiewicz 偶联结合到轮烷中。轮烷的身份通过核磁共振光谱和质谱确认。菲
Synthesis of [2]Rotaxanes by the Catalytic Reactions of a Macrocyclic Copper Complex
作者:Shinichi Saito、Eiko Takahashi、Kazuko Nakazono
DOI:10.1021/ol062247s
日期:2006.10.1
We synthesized [2]rotaxanes by the reactions catalyzed by a macrocyclic Cu(I)-phenanthroline complex. The catalytic site was located inside the ring component so that the rotaxane could be selectively formed. A C-S bond-forming reaction and oxidative dimerization of alkyne was utilized for the efficient synthesis of a new series of [2]rotaxanes. [reaction: see text]
作者:Levon D. Movsisyan、Michael Franz、Frank Hampel、Amber L. Thompson、Rik R. Tykwinski、Harry L. Anderson
DOI:10.1021/jacs.5b12049
日期:2016.2.3
Active metal template Glaser coupling has been used to synthesize a series of rotaxanes consisting of a polyyne, with up to 24 contiguous sp-hybridized carbon atoms, threaded through a variety of macrocycles. Cadiot–Chodkiewicz cross-coupling affords higher yields of rotaxanes than homocoupling. This methodology has been used to prepare [3]rotaxanes with two polyyne chains locked through the same macrocycle
[3]Rotaxanes with Mixed Axles: Polyynes and Cumulenes
作者:Michael Franz、Johanna A. Januszewski、Frank Hampel、Rik R. Tykwinski
DOI:10.1002/ejoc.201900188
日期:2019.6.10
The formation of [3]rotaxanes (Type 2.1 and Type 3) that feature both a polyyne and a cumulene axle were explored. This includes assembly and spectroscopic characterization of a Type 3 [3]rotaxane that features two [9]cumulene axles