A Six-Crossing Doubly Interlocked [2]Catenane with Twisted Rings, and a Molecular Granny Knot.

A Six-Crossing Doubly Interlocked [2]Catenane with Twisted Rings, and a Molecular Granny Knot.
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一个六跨双锁定的链球[2]与扭曲的环和一个分子奶奶结。

DOI:
10.1002/anie.201807135
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发表时间:
2018-10-15
期刊:
Angewandte Chemie (International ed. in English)
影响因子:
--
通讯作者:
Vitorica-Yrezabal IJ
Vitorica-Yrezabal IJ
中科院分区:
其他
文献类型:
--
作者:
Danon JJ;Leigh DA;Pisano S;Valero A;Vitorica-Yrezabal IJ

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通过铁(II)配位的2×2交织网格的环合烯烃复分解,构建了一个分子链(六个交叉,双互锁,[2]带有扭曲环的[2]环状链环)和一个31#31奶奶结(由两个相同手性的三叶缠结组成的复合结)。连接是由悬挂的苯基引导的,在网格的相同面上的近端配体末端之间。通过回收大小排除层析将连接从拓扑异构体奶奶结中分离出来。通过串联质谱仪和X射线结晶学确定了每个拓扑异构体的结构,揭示了两个82元大环,每个大环都呈八字形构象,通过两对环连接。
A molecular link (a six crossing, doubly interlocked, [2]catenane with twisted rings) and a 31#31 granny knot (a composite knot made up of two trefoil tangles of the same handedness) were constructed by ring‐closing olefin metathesis of an iron(II)‐coordinated 2×2 interwoven grid. The connections were directed by pendant phenyl groups to be between proximal ligand ends on the same faces of the grid. The link was separated from the topoisomeric granny knot by recycling size‐exclusion chromatography. The identity of each topoisomer was determined by tandem mass spectrometry and the structure of the link confirmed by X‐ray crystallography, which revealed two 82‐membered macrocycles, each in figure‐of‐eight conformations, linked through both pairs of loops.
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