Triply Threaded [4]Rotaxanes

被引:45
作者
Danon, Jonathan J. [1 ]
Leigh, David A. [1 ,2 ]
McGonigal, Paul R. [2 ]
Ward, John W. [1 ]
Wu, Jhenyi [2 ]
机构
[1] Univ Manchester, Sch Chem, Oxford Rd, Manchester M13 9PL, Lancs, England
[2] Univ Edinburgh, Sch Chem, Kings Bldg,West Mains Rd, Edinburgh EH9 3JJ, Midlothian, Scotland
基金
英国工程与自然科学研究理事会;
关键词
ACTIVE-TEMPLATE SYNTHESIS; SWITCHABLE MOLECULAR SHUTTLES; ROTAXANES STABILIZATION; BLOCKING GROUP; RING; MACROCYCLES; CLICK; SIZE; STABILITY; PATHWAY;
D O I
10.1021/jacs.6b07733
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
[4]Rotaxanes featuring three axles threaded through a single ring have been prepared through active metal template synthesis. Nickel-catalyzed sp(3)-sp(3) hornocouplings of alkyl bromide "half-threads" through 37- and 38-membered 2,2':6',2"-terpyridyl macrocycles generate triply threaded [4]rotaxanes in up to 11% yield. An analogous 39-membered macrocycle produced no rotaxane products under similar conditions. The constitutions of the [4]rotaxanes were determined by NMR spectroscopy and mass spectrometry. Doubly threaded [3]rotaxanes were also obtained from the reactions but no [2]rotaxanes were isolated, suggesting that upon demetalation the axle of a singly threaded rotaxane can slip through a macrocycle that is sufficiently large to accommodate three threads.
引用
收藏
页码:12643 / 12647
页数:5
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