- Synthesis of Conjugated Polyrotaxanes
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A series of conjugated polyrotaxane insulated molecular wires are synthesised by aqueous Suzuki polymerisation, using hydrophobic binding to promote threading of the cyclodextrin units. These polyrotaxanes have conjugated polymer cores based on poly(para-
- Michels, Jasper J.,O'Connell, Michael J.,Taylor, Peter N.,Wilson, Joanne S.,Cacialli, Franco,Anderson, Harry L.
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- Synthesis and complexation of back-to-back capped bis-dioxocyclams
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Pyridine-capped 5,12-dioxocyclams were coupled back-to-back directly, with one or two intervening phenyl groups, an ethynyl group, or a diazo group via Suzuki, Sonogashira, or reductive coupling of the 4-nitropyridine monocyclam. These bis-dioxocyclams linked through extended π-conjugated systems were complexed to copper(II) and cobalt-(III), producing bis-metal complexes which were characterized spectroscopically and electrochemically. These studies gave little evidence for electronic communication between metal centers across the π-conjugated linkers.
- Gil, Jun Mo,David, Scott,Reiff, Angela L.,Hegedus, Louis S.
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p. 5858 - 5865
(2008/10/09)
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- Efficient and convenient nonaqueous workup procedure for the preparation of arylboronic esters
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An efficient one-pot synthetic protocol for the synthesis of arylboronic esters has been established. The concentrated addition mixture of trimethylborate with aryl Grignard reagents was treated with low molecular weight diols (ethylene glycol, 1,3-propandiol) and toluene, the corresponding arylboronic esters were isolated in a convenient way with high yields. The diols not only serve as water replacement for the workup step, but also as well as the reagent for the preparation of arylboronic esters.
- Wong, Ken-Tsung,Chien, Yuh-Yih,Liao, Yuan-Li,Lin, Chang-Chih,Chou, Meng-Yen,Leung, Man-Kit
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p. 1041 - 1044
(2007/10/03)
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